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Filling structure design and cooling mechanism study of the heat-not-burn cigarettes with sidewall openings Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-16 Sha Ding, Jinghao Zhang, Suxing Tuo, Yuan Wang, Jiaxiao Cai, Xing Liu, Jingjie Ren
The smoke temperature of heat-not-burn cigarettes is usually high, which affects the user experience. This study investigates the application of filled structures in the cooling process of heat-not-burn cigarette smoke through experiments and numerical simulations. A cigarette structure that can effectively reduce the smoke temperature is identified. The temperature distribution characteristics and
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Enhancing recuperators performance in supercritical CO2 Brayton cycle of solar power plants through ribbed heat transfer plates Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-16 M. Khoshvaght-Aliabadi, P. Ghodrati, Y.T. Kang
Sixteen diverse combinations of ribbed heat transfer plates (HTPs), comprising continuous and discontinuous rib configurations, are investigated as potential replacements for traditional smooth HTPs in both the low-temperature recuperator (LTR) and high-temperature recuperator (HTR) of supercritical CO Brayton cycles. The findings indicate that the impacts of the introduced HTPs are more significant
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Numerical simulation of condensation flows of humid air in the high-pressure pneumatic pressure-reducing valve Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-16 Longlong Gao, Jiahui Ren, Weijia Lei, Zhixin Zhao, Yuhao Fan, Baoren Li
The phenomenon of condensation and ice formation exists in the high-pressure air pressure-reducing valve (HPAPRV), severely impacting the pressure-reducing valve's aerodynamic performance and operational safety. The problem is that the phase change of humid air in a high-pressure supersonic flow is not fully understood. This study aims to elucidate the condensation effect in high-pressure supersonic
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Influence of solar insolation on energy and exergy efficiency of a rectangular duct solar air heater with various types of V rib roughness: An analytical approach Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-16 Avinash K. Hegde, Raghuvir Pai, K. Vasudeva Karanth
In the current work, the energy and exergy evaluations for several V ribs in a rectangular duct SAH are evaluated and compared with smooth SAH for a heat flux range of 800 to 1200 W/m. The analysis uses correlations for the friction factor and Nusselt number for different V ribs that have been developed by various researchers. The investigators' recommended optimum design parameters are employed to
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An efficient Green's function-based Bayesian optimization method for the thermal optimization of multi-chips on a silicon interposer Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-16 Chengdi Xiao, Wenkai Zheng, Qing Tian, Xixin Rao, Haitao Zhang
The escalating adoption of multi-chips configurations in integrated circuits has intensified concerns about power density and heat generation. Inadequate chip layout design can lead to localized overheating, triggering chip component degradation and a decline in module performance. Consequently, proficient thermal design and temperature regulation are crucial. This paper presents a rapid optimization
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Optimized heat transfer systems: Exploring the synergy of micro pin-fins and micro Vortex generators Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-16 Ali Heydari, Amir Noori, Ali Khosravani Nezhad, Kiarash Kord
The advancement of electronic devices has led to an increase in power consumption and miniaturization, culminating in a more focused heat generation, making it imperative for heat transfer systems to perform optimally while consuming minimal energy. To this end, this study combines two concepts of micro pin-fins and micro vortex generators to enhance heat transfer and mixing, with the aim of improving
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Near-unity nonreciprocal thermal radiation in biaxial van der Waals material-Weyl semimetal heterostructures Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-16 Ziheng Gu, Qiang Zang, Gaige Zheng
Polaritons in natural van der Waals (vdW) materials have drawn significant attention as the unique optical properties and have opened doors for various potential applications. -phase molybdenum trioxide (-) has been revealed as a semiconducting anisotropic vdW material that holds great promise for manipulating orthogonal in-plane phonon polariton (PhP) modes in infrared (IR). Here, we consider an attenuated
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Optimization design of proton exchange membrane fuel cell cooling plate based on dual-objective function topology theory Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-15 Wenwen Liang, Junheng Liu, Jiyu Li, Wenyao Zhao, Chengcheng Ao, Xintao Wang, Ping Sun, Qian Ji
To enhance the cooling performance of proton exchange membrane fuel cell (PEMFC), the structural design of cooling channel of PEMFC with dual-objective function model is conducted based on topology optimization. The cooling characteristics of topological and traditional cooling plates under different channel depths () and coolant inlet velocities () were comparatively investigated by constructing the
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Effects of gas diffusion layer thickness on PEM fuel cells with composite foam-rib flow fields Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-15 Wei Gao, Qifeng Li, Kai Sun, Rui Chen, Zhizhao Che, Tianyou Wang
Gas diffusion layers (GDLs) play a crucial role for the performance of proton exchange membrane fuel cells (PEMFCs). The utilization of composite foam-rib flow fields (CFRFFs) can alter the reactant gas transfer pattern, hence improving the efficiency of under-rib reactant gas transfer and water drainage. The impact of the cathode and anode GDL thicknesses ( and ) on the performance of CFRFF design
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Modeling coupled growth and motion of solid-air dendrite induced by convection in liquid hydrogen using phase-field lattice Boltzmann method Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-15 Chaolong Li, Jian Wen, Ke Li, Simin Wang
The safety hazard arising from the growth, condensation and accumulation of trace air in liquid hydrogen deserves attention. In order to predict the microstructural growth evolution and oxygen solute segregation distribution characteristics during solid-air dendrite motion induced by solution convection, a partially saturated bounce-back lattice Boltzmann coupled non-isothermal phase field method (PSLBM-PF)
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Decoding the effect of different tumor heterogeneities on thermosensitive liposome drug delivery during radiofrequency ablation: A novel heat and mass transfer perspective Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-14 Ajay Bhandari, Anup Singh, Wenbo Zhan
Radio-frequency ablation (RFA)-mediated thermosensitive liposomes (TSL) drug delivery promotes loco-regional drug delivery, simultaneously reducing systemic toxicity. However, the heterogeneous intratumoral microenvironment, such as non-uniformly distributed microvascular network, extracellular matrix, intracellular space, disproportionate blood flow through tumor microvessels, and disparate extracellular
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Thermal resistance optimization of ultra-thin vapor chamber based on data-driven model and metaheuristic algorithm Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-14 Guimin Ye, Yuxuan Sheng, Yaping Zou, Yang Zhang, Wentao Tong, Xiao Yu, Qifei Jian
The ultra-thin vapor chamber(UTVC) is extensively utilized across various fields due to its excellent heat dissipation performance and good temperature uniformity. The data-driven modeling approach is well suited to predict the thermal resistance of the UTVC due to its great flexibility and accuracy. In this paper, a novel approach is proposed to optimize the UTVC thermal resistance, which combines
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Experimental and numerical investigation on the mechanisms of novel heat transfer deterioration of supercritical CO2 in vertical tubes Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-13 Zenan Yang, Hao Wang, Ben Guan, Haiwei Yang, Zehuan Li, Ge Wang
Understanding the mechanisms of supercritical CO heat transfer deterioration (HTD) has significant importance for ensuring the safety and reliability of supercritical Brayton cycles. Therefore, the effects of mass flux, wall heat flux, and tube diameters on the heat transfer characteristics of supercritical CO inside vertical tubes are studied using experimental and numerical methods. Results indicate
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Advancements and insights in thermal and water management of proton exchange membrane fuel cells: Challenges and prospects Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-13 Zhenya Zhang, Jia Mao, Zhengxuan Liu
In response to the growing global demand for clean and sustainable energy solutions, proton exchange membrane fuel cells (PEMFCs) have emerged as vital components in diverse decarbonization strategies. Despite their increasing importance, a comprehensive synthesis of recent advancements, challenges, and future prospects in thermal and water management within this domain remains notably scarce. This
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Supercooling suppression and thermal conductivity enhancement of erythritol using graphite foam with ultrahigh thermal conductivity for thermal energy storage Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-12 Chongyang Wei, Yi Li, Jinliang Song, Jinxing Cheng, Zhongfeng Tang
The application of erythritol to medium-temperature latent heat energy storage systems is limited by its low thermal conductivity and large supercooling. Three types of graphite foams (GFs) with different thermal conductivities were used as the porous skeleton for encapsulating erythritol via vacuum impregnation, and the erythritol/GF composites were investigated using different methods to solve the
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Effects of vortex generators on endwall film cooling in a turbine vane Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-12 Zhiyuan Zhao, Fengbo Wen, Yuxi Luo, Ying Wang, Xinghong Zhang, Songtao Wang
Film cooling is widely applied on endwalls in high-performance gas turbines to guarantee the safety and endurance of the engines. Micro ramps are employed to optimize the flow and thermal performance in internal and external cooling designs. In the current investigation, flat-surface film cooling at the blowing ratio of 1.0 and the density ratio of 2.0 is investigated with and without the micro ramp
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Numerical analysis on multiple parameters for overall cooling effectiveness of impingement effusion cooling with low Reynolds number Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-10 Dingcheng Zhang, Haibin Liu, Pingting Chen, Junkui Mao
Research on gas turbine cooling features is extensive, yet studies focused on conventional Reynolds numbers () cannot effectively address the impact of low on blade cooling performance, especially relevant for high-altitude unmanned aerial vehicles operating under extremely low . In the current study, conjugate heat transfer simulations with Computational Fluid Dynamics (CFD) are used for the cooling
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Comparative investigation of numerical simulation and experimental study of electroconvection layer in natural convection heat transfer enhanced by an electric field Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-10 Ming Gao, Wen-bin Cui, Ling-shuang Zhang, Bang-hui Zhang, Qin Lou
This article utilizes numerical simulation methods, grounded in experimental data and models to investigate the formation process of the electroconvection layer and its role in enhancing natural convection heat transfer. After verifying the feasibility of the model, the experimental results were compared with the numerical results, and numerical calculations were performed under experimental conditions
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The effects of cell stretching on the thermal and flow characteristics of triply periodic minimal surfaces Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-09 Osezua Ibhadode
Traditional heat sinks and exchangers employ internal structures like fins and plates, but recently, structures formed from Triply Periodic Minimal Surfaces have shown promise in achieving comparable or superior convective heat transfer capacities with reduced material volume utilization. This research investigates the impact of cell stretching on the thermal and hydraulic performance of diamond and
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Thermal management of the monochromator premirror in beamline FEL-1 at S3FEL Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-08 Zhongmin Xu, Chuan Yang, Weiqing Zhang
For the monochromator premirror in FEL-1 at SFEL, the deformation induced by moving high heat load and gravity severely affects the X-ray beam quality during its off-axis rotation. To meet the premirror shape error requirement for X-ray coherent transport, the integration of passive cooling and active heating systems for thermal management of the monochromator premirror has been proposed, modeled,
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Evaluation and optimization of supercritical cycles using CO2 based mixtures as working fluids: A thermodynamic study Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-08 Al Bara Shalaby, Nadeem Ahmed Sheikh, Abubakr Ayub, Muhammad Ahmed, Muhammad Imran, Muhammad Wakil Shahzad
This study focuses on the thermodynamic performance analysis and optimization of CO-based binary fluid mixtures in supercritical thermodynamic power cycles exploiting high-temperature waste heat. Response surface method is used to establish relationships between cycle performances and significant cycle parameters. Multi-objective optimization is carried out to obtain optimal solutions with higher cycle
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Aerothermal characteristics evaluation for different tip configurations without and with film cooling on transonic turbine Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-07 Ji Hu, Qun Zheng, Ping Dong, Guoqiang Yue
The aerodynamic, heat transfer and film cooling characteristics of three tip configurations (including pressure-side partial squealer tip, suction-side partial squealer tip and cavity squealers tip) with cooling are evaluated on transonic turbine, and the effect of the jet and shroud motion are talked. The flow and heat transfer mechanisms of three cooled tip configurations are analyzed. Results show
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Intermittent spray cooling on rationally-designed hierarchical surfaces for enhanced evaporative heat transfer performance Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-07 Jaehwan Shim, Seokkan Ki, Donghyun Seo, Byungyun Moon, Soosik Bang, Youngsuk Nam
We propose the high-performance evaporative spray cooling strategy by combining the hierarchical flake formation and the intermittent spraying. A simple, scalable, and cost-effective method was introduced to fabricate hierarchical flakes with multi-scale wicks where the size of the pores varies along the direction normal to the wick plane, which provides substantially improved wicking capability for
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Effect of buoyancy-thermocapillary convection on evaporation process of water in cylindrical pool heated by sidewall at low pressures Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-07 Si-Bo Wan, Fan Zhang, Li Zhang, Chun-Mei Wu, You-Rong Li
The process of water evaporation is always accompanied by buoyancy and thermocapillary convections. To explore the effect of the flow on the evaporation rate and energy transfer, a mathematical model including liquid, vapor, solids, and the temperature jumps measured experimentally is established, and a series of numerical simulations of water evaporation in a cylindrical pool heated by the sidewall
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Pressure-drop and mass transfer study in multi-stage PSRBC sparger bubble column-An experimental investigation Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-07 Shakti Prasanna Khadanga, Deepak Kumar Samal, Prabina Kumar Patnaik, Gopendra Kishore Roy
The comparative study on pressure-drop and mass transfer in multi-stage and single stage pressure swing rotating bubble cap (PSRBC) sparger bubble column have been investigated with air-water system in continuous mode. The compressed air was supplied counter currently with the flow of water at various superficial air velocities from the bottom of the column. The air pressure-drop inside the column
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The study of nanoscale boiling on hierarchical nanostructured surfaces using molecular dynamics simulation Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-07 Shakeel Ahmad, Hui Cheng, Zulfiqar Ali, Wei Deng, Kwun Ting Lau, Hafiz Muhammad Ali, Jiyun Zhao
Hierarchical nanostructured surfaces demonstrate significant improvements in boiling heat transfer, making them particularly appealing in thermal energy applications. This study utilizes molecular dynamics simulations to investigate how the vertical spacing and shape of nanobumps impact boiling heat transfer processes over hierarchical nanostructured surfaces. The findings show a notable influence
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A fully analytical solution for 1-D advection-conduction heat transfer problems with non-isothermal solid↔liquid phase change Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-07 Juan C. Álvarez-Hostos, Mauricio R. Mascotto, Alfonso D. Bencomo, Alirio J. Sarache-Piña, Víctor D. Fachinotti
An unprecedented analytical solution for steady 1-D advection-conduction thermal problems with substances undergoing non-isothermal solidliquid phase change is introduced in this communication. The proposed solution allows for solid and liquid phases with contrasting physical and transport properties, and the mathematical handling in the mushy zone is ensured via averaging techniques based on the solid
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Enhancement and optimization of cryogenic metal tube chilldown heat transfer using thin-film coating, II. Chilldown efficiency, flow direction and tube wall thickness Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-06 Hao Wang, Bohan Huang, Jun Dong, J.N. Chung, J.W. Hartwig
This paper is the second of a two-part series that presents experimental data and analysis on the liquid nitrogen quenching heat transfer process of a stainless-steel tube with an inner surface low-thermal conductivity thin-film coating. This paper focuses on the effects of different flow directions and two tube wall thicknesses. Additionally, this paper also provides an analysis on the chilldown thermal
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Enhancement and optimization of cryogenic metal tube chilldown heat transfer using thin-film coating, I. Effects of flow mass flux and coating layer thickness Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-06 Hao Wang, Bohan Huang, Jun Dong, J.N. Chung, J.W. Hartwig
This paper is the first of a two-part series that presents experimental data and analysis on the liquid nitrogen quenching heat transfer process of a stainless-steel tube with an inner surface low-thermal conductivity thin-film coating. The experimental data covers a wide range of flow mass fluxes (43 to 1077 kg/ms). The experiments were conducted using test tubes with four different coating thicknesses
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Radial temperature gradient investigation of the large-diameter ball screw based on mathematical modelling Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-06 Xin Sheng, An Liu, Chen Gao, Xi Lu, Yadong Xu, Jianrun Zhang
Thermal error compensation for up-to-date high precision machine tools have put forward higher requirements to accurate description of the temperature field. As the core component of transmission mechanism, either experimental test or FEM has itself insurmountable shortcomings when acquiring temperature information of the ball screw in work. Specific to the reciprocating-motion nut heat source, a simplified
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Calculation of two-fluid subchannels model of pressurized water reactor: Picard Krylov method Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-06 Yuhang Zhang, Zhaofei Tian, Lei Li, Guangliang Chen, Hao Qian, Lixuan Zhang, Yuguan Jin
A Picard Krylov method for solving the two-fluid subchannel analysis model has been proposed to improve the accuracy and efficiency of thermal conduction and convection coupling calculations in the pressurized water reactor core. Generally speaking, the Picard algorithm has high coupling accuracy and good robustness, but has low computational efficiency, while the Newton Krylov method has higher coupling
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Bifacial near-field thermophotovoltaic converter with transparent intermediate substrate Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-06 Minwoo Choi, Jaeman Song, Bong Jae Lee
Thermophotovoltaic (TPV) converters generate electricity from thermal radiation by hot emitters powered by various heat sources. Near-field TPV converters achieve a significant increase in power output density through a sub-micron vacuum gap between the emitter and the photovoltaic (PV) cell, exploiting near-field thermal radiation. Recently, bifacial TPV converters, operating in the far-field regime
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Marangoni effect on the bubble departure and CHF in subcooled flow boiling of pure water and surfactant solutions Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-06 Jue Wang, Shifan Ouyang, Bin Li, Junfeng Wang, Zhentao Wang
In the present study, flow boiling experiment using ITO transparent heating method and LBM simulation by improved Shan-Chen model are conducted to confirm Marangoni effect on the bubble departure and CHF in subcooled flow boiling heat transfer of pure water and CTAC/NaSal(1:1) solutions. Tests are performed with the same tube of = 2.6 mm, inlet fluid temperature of = 80 °C and outlet pressure of = 101
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Numerical study of thermal-hydraulic performance enhancement in a shell-and-tube milli-reactor Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-06 Gang Fu, Dan Wei, Yong Pan, Lei Ni, Juncheng Jiang
Sizing-up of microchannels is a promising strategy for microreactor scale-up while heat management is essential in this process. However, thermal-hydraulic performance of shell-and-tube heat exchangers/reactors with milli-channels was seldom studied. In this work, heat transfer performance of this kind of exchanger/reactor was numerically investigated, which can serve as an excellent reference for
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Uncertainty quantification in effects of geometric deviations on heat transfer and film cooling of blade squealer tip with pressure-side coolant Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-06 Yulong You, Liang Ding
Uncertainty quantification of heat transfer and cooling effectiveness on turbine squealer tip with pressure side coolant was anaylzed by Polynomial chaos expansion (PCE) with numerical simulation. Cavity depth, tip clearance and hole diameter were selected as random geometric deviations. Deviation of heat transfer and cooling effectiveness on tip reaches 2.5–9.1% and 10.5–25.6% of mean value respectively
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Experimental investigation on heat transfer of an impinging jet of supercritical CO2 and comparison with liquid and gaseous CO2 Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-05 Seon Ho Kim, Seong-Hyeok Park, Hee Seung Park, Wei-Ting Hsu, Hyung Hee Cho
In this study, a CO circulation loop system is constructed to investigate the heat transfer of an impinging jet under various CO states, including liquid, gaseous, and supercritical states (sCO). In order to evaluate the quantitative effect of the CO states on heat transfer, mass flow rate, temperature and pressure of the jet and chamber, and heat flux of the impinging plate are systematically varied
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Porous media model simulates thermal-hydraulics of nuclear research reactors with flat and curved plate fuel assembly Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-05 Mehedi Hasan Tusar, Palash K. Bhowmik, Kazuma Kobayashi, Syed Bahauddin Alam, Shoaib Usman
The advancement of nuclear research reactors hinges on precise thermal-hydraulic analyses, especially when reactors undergo potential design modifications or power uprates. This study uses the computational fluid dynamics (CFD) tool, FLUENT, to analyze thermal-hydraulic behavior in the Replacement Research Reactor (RRR) and the Missouri University of Science and Technology Reactor (MSTR). The RRR model
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Machine learning based frost thickness prediction of carbon fiber-reinforced polymer composite fin for potential heat pump application Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-05 Saleem Abbas, Chan Woo Park
Frost formation on evaporator fins significantly reduces their thermal performance, which can be handled via frost retardation and periodic defrosting methods. Focusing on electrical as well as thermal performance of evaporator fins, a carbon fiber-reinforced polymer composite (CFRP) fin was fabricated for potential application in heat pump evaporators, and frost thickness on the fin for natural convection
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Numerical investigation on regeneration-transpiration combined cooling of cavity structure in scramjet engine Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-05 Xue Liu, Yuyang Bian, Weixing Zhou, Jiayue Zheng, Zhenjian Jia
As a key component in the scramjet engine, the cavity plays a role in promoting the mixing of fuel and oxidant, but it also faces the problem of high temperature damage. Because it is difficult to meet the thermal protection requirements of higher Mach number by only using pure regenerative cooling to cool the cavity, this paper studies the cooling effect of regeneration-transpiration combined cooling
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Design of a multi-scale cylindrical porous fin based on constructal theory Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-04 Xiaoye Liu, Huijun Feng, Lingen Chen, Yanlin Ge
Porous fin (PF) has obvious advantages in heat dissipation, so it is necessary to analyze and optimize its performance. In this paper, a multi-scale cylindrical porous fin (PF) model is built. Firstly, the fin length and height ratio are chosen as the optimization variables, constructal design is conducted with the objective of complex function (CF) composed of maximum temperature difference (MTD)
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Constructal design for composite heat dissipating structure composed of an “arrow”-shaped high conductivity channel and an externally connected “T”-shaped fin Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-04 Lingen Chen, Huijun Feng, Fengyin Zhang, Yanlin Ge
A composite heat dissipating structure model composed of an “arrow”-shaped high conductivity channel and an externally connected “T”-shaped fin is established based on constructal theory, and the optimal constructs are obtained with objectives of minimum maximum temperature difference and minimum entropy production rate, respectively. Effects of conductivity ratio and area ratio of high conductivity
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Visual identification of two-phase flow patterns in adiabatic air-water flow in porous media using a refractive index matching technique Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-02 Vishal V. Nirgude, Sai Raja Gopal Vadlamudi, Mayank Modak, Hyun Sun Park
Understanding two-phase flow patterns in porous media is essential for estimating interfacial friction, and consequently, the coolability limit of debris bed – dry-out heat flux – in the event of a severe accident in nuclear power plants. The lack of clear visual data on two-phase flow in porous media led to the development of multiple maps to identify flow patterns based on void fraction and particle
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Component effect on the flow and heat transfer of supercritical liquefied natural gas in a submerged combustion vaporizer Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-01 Junhua Bai, Yu Ren, Jiajia Yang, Nan Zhang, Jie Pan, Yixiang Zhang
A submerged combustion vaporizer (SCV) is a popular vaporizer that is utilized for the peak regulation of liquefied natural gas (LNG) in cities or as the main vaporizer in cold regions. Due to the different genesis of reservoirs, LNGs from different production places have different components and ratios, leading to a different gasification state in the heating tube, difficultly in predicting the SCV
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Heat and mass transfer enhancement in nonlinear mixed convective flow: Buongiorno model and melting heat phenomenon Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-01 Sohail A. Khan, T. Hayat, A. Alsaedi, B. Ahmad
Melting heat transport is important in different developments comprising melting of permafrost, melting of soil, semiconductor preparation, sustainable energy enhancement, magma solidification, electronics cooling, a manufacturing development modeling, permafrost melting and frozen grounds thawing. Here nonlinear mixed convection in magnetohydrodynamic nanomaterial flow is explored. Flow through stretching
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Heat transfer characteristics of fin-tube heat exchangers coated with single-walled carbon nanotubes under various coating concentrations Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-01 Changho Han, Sewon Lee, Dongchan Lee, Minwoo Lee, Jinyoung Kim, Yongchan Kim
The application of single-walled carbon nanotube (SWCNT) coatings to heat exchanger surfaces can improve energy efficiency owing to its excellent thermal properties. However, studies on the heat transfer characteristics of fin-tube heat exchangers (FTHXs) coated with SWCNTs (SCNTHXs) are limited. In this study, the heat transfer performances of SCNTHXs with various coating conditions were measured
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Study on heat transfer enhancement performance of cooling channel with elliptical dimples in a proton exchange membrane fuel cell Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-01 Xiang Zhang, Ying Huang, Zongpeng Ma, Tong Gao
Cooling channel (CC) design is an effective measure to improve the internal thermal management of proton exchange membrane fuel cells (PEMFC). In this paper, a new elliptical dimple (EDC) cooling channel structure is proposed. The heat transfer and flow characteristics of EDC, circular dimpled cooling channel (CDC), and smooth cooling channel (SC) are compared by numerical simulation method, and the
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Extraordinary boiling enhancement by hybrid dividing zones of micro-nano structures Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-01 Xingchi Jiang, Syed Waqar Ali Shah, Gong Chen, Shangzhen Xie
Boiling two-phase transition is considered to be the ultimate effective cooling strategy for the next generation of high-power devices in the near future in various application scenarios, such as power electronics, radar systems, and computer data centers. The liquid-solid interface plays a crucial role in the boiling phase change and the bubble evolvement. This study proposes a novel architecture
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Numerical simulation of flow and heat transfer performance of tube-shell coupled helically coiled corrugated tube heat exchanger Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-03-01 Yiran Duan, Xiaoyan Zhang, Ziyi Han, Qingjiang Liu, Xingge Li, Linchuan Li
To enhance heat transfer, this study proposes a new compound enhancement structure combining helical tube with centrosymmetric sinusoidal corrugations. A tube-shell coupled model of helically coiled corrugated tube heat exchanger (HCCTHE) is established. The impacts of Reynolds number, corrugation height, and corrugation length on flow and heat transfer performance are numerically analyzed by using
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Application of modified Fourier's law in a fuzzy environment to explore the tangent hyperbolic fluid flow over a non-flat stretched sheet using the LWCM approach Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-02-29 Priya Bartwal, Himanshu Upreti, Alok Kumar Pandey, Navneet Joshi, B.P. Joshi
The flow of fluid over a surface that is being stretched has numerous important potential uses, such as polymer extrusion, coating, etc. The objective of this study is to investigate the characteristics of flow attributes (velocity, temperature, skin friction coefficient, and local Nusselt number) under specific conditions, when a quadratic convective flow of tangent hyperbolic fluid is applied over
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A distributed parallel computing-based CFD analysis of plate-type fuel assemblies in CARR reactors Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-02-29 Xinli Yin, Guangliang Chen, Hao Qian, Lei Li, Shaomin Su, Hongwei Jiang, Hanqi Zhang
Fine flow and heat transfer characteristics are critical to nuclear reactor safety. However, a comprehensive CFD calculation of the entire reactor core requires substantial computing resources, restricting the research domain's scope. To address this issue, we propose a Distributed Parallel (DP) computing scheme, tailored specifically for reactor cores using plate-type fuel assemblies. This study focuses
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Optimal design of maximally amplified thermal concentrators with homogeneous and isotropic materials Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-02-29 Chen-Long Wu, Bin Wang, Hao Wang, Neng-Zhi Yao, Xuesheng Wang
In recent years, thermal metamaterials have garnered significant interest due to their remarkable potential for manipulating thermal fields, leading to the development of thermal metadevices. However, most thermal metadevices are based on coordinate transformation theory, which associates spatial distortions and transformations with material parameters, resulting in inhomogeneous and anisotropic properties
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A finite volume and machine learning based investigation of flow dynamics in a vertical duct heated by the sunlight Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-02-29 Yuchi Leng, Shuguang Li, Mohammed K. Al Mesfer, Mohd Danish, Kashif Ali, Sohail Ahmad, Kashif Irshad
Thermal and flow features of nanofluid are explored under the impact of an external magnetic field whereas fluid is flowing inside a vertical square duct. It is assumed that the sunlight tends to heat up the duct. Two fins are attached to the duct that receive sunlight of uniform intensity. Two walls of the duct contain a fixed temperature and, are exposed to the direct sunlight under the assumption
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A new heat transfer prediction method for supercritical liquefied natural gas in horizontal tubes Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-02-29 Yuan Wang, Ming-Shu Bi, Wei Gao, Jing-Hao Zhang, Shao-Chen Sun, Jing-Jie Ren
The SCV is a key gasification device at commercial receiving terminals for peak-shaving purposes. This study focuses on the prediction methods for forced convection heat transfer during the flow of supercritical liquefied natural gas (LNG) within the SCV. Initially, a comprehensive database comprising 17,918 data points is established through numerical simulations of supercritical LNG under varying
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Numerical simulation on the effect of non-condensable gas on direct contact condensation of steam jet in a narrow pipe Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-02-28 Xianbing Chen, Tao Zhou, Wenke Zhang, Yukun Feng, Kun Wang, Houke Liu
A numerical model was developed to investigate the phenomenon of direct contact condensation involving steam-air jet in subcooled waterflow. This study encompassed a comprehensive exploration of the influence exerted by non-condensable gas from a multi-faceted perspective. These aspects included an examination of gas plume shape, distribution of air mass fraction, variation in axial thermodynamic parameters
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PDMS/functionalized h-BN/liquid metal flexible composite with dual-network structure for achieving superior thermal conductivity and low thermal resistance via interfacial grafting Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-02-28 Junhui Fan, Dahai Zhu, Yifan Li, Changqing Liu, Huaqing Xie, Wei Yu
Thermal interface materials (TIMs) play a crucial role in addressing the heat dissipation challenges associated with high-power electrical equipment. Apart from possessing excellent thermal conductivity, and they must also exhibit low contact thermal resistance to facilitate efficient heat transfer at the interface. In this study, a novel composite with a dual-network structure was prepared by interfacial
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Numerical analysis of heat and moisture transfer in waterproof and breathable composite fabric used for steam protective clothing Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-02-28 Yun Su, Jiahao Yao, Jun Li, Miao Tian
A coupled heat and moisture transfer model for waterproof and breathable composite fabrics was developed to examine the behavior of steam heat transfer in porous and hygroscopic membranes. The model accounted for the impact jet flow at outer boundary of fabric, Darcian flow, molecular diffusion, dynamical absorption and phase change of moisture in the fabric. The predictive model was validated by experimental
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An efficient aluminum gradient mesh wick for enhancing boiling heat transfer performance Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-02-24 Yifu Liang, Haozhou Huang, Caiman Yan, Xuepeng Yuan, Yong Tang, Jingjing Bai, Shiwei Zhang
With the rapid development of high-power electronic devices, phase change heat transfer has attracted much attention for efficient and lightweight thermal management. However, the mesh structure design for aluminum-based pool boiling enhancement still lacks experimental investigation and theoretical analysis. Herein, an aluminum gradient mesh wick is developed for efficient heat transfer performance
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Peakon and solitary wave solutions of the LAX equation: Neuro computing procedure Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-02-23 A. Waheed, M. Awais, M.A.Z. Raja, M.Y. Malik, A.S. Alqahtani
Soliton also known as solitary waves have found utility in medical imaging, specifically in the study of brain waves and neuronal activity. The potential applications of solitons span communication systems, where solitons can maintain their shape over long distances without dispersion where they model waves that propagate without changing form. Here, the exp-function method is used to create several
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Capillary-driven evaporation of superhydrophilic copper foams with ultra-high porosity Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-02-22 Chuanwen Lv, Liguo Xu, Jiaxi Du, Jialin Liang, Binjian Ma, Huizhu Yang, Dong Chen, Yonggang Zhu
Capillary-driven evaporation in porous wicks widely exists in vapor chambers, heat pipes, etc. Porous wicks with high porosity are expected to increase critical heat flux (CHF). Here, the superhydrophilic copper foam with 92.5% porosity is adopted, with nanostructures coated on its skeleton. The effect of wicking length () on CHF and thermal resistance () is experimentally studied. The capillary rise
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Optimization of thermal-hydraulic performance for pillar-reinforced vapor chamber using Lee model based numerical scheme and analysis of variance Int. Commun. Heat Mass Transf. (IF 7.0) Pub Date : 2024-02-22 Yusuf Rahmatullah, Tsrong-Yi Wen
Vapor chamber is a promising thermal solution for high-power electronics. However, achieving its full potential requires well-designed sintered powder pillars, including pillar diameter, porosity, and pitch. Neglecting these pillar design factors can adversely affect thermal-hydraulic performance, leading to further failures. This paper utilizes numerical simulation and analysis of variance to visualize