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Heat transfer study on different surface textured pin fin heat sink Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201123
Saravanakumar. T; Senthil Kumar. DThe flow and heat transfer characteristics of different surface texture pin fins were experimentally investigated. The pin fin outer surface texture has been modified to different threaded surface texture (i.e., Metric, Worm, ACME, Buttress, Sharp V, Whitworth and square thread) without changing crosssectional areas. The Reynolds number based on hydraulic diameter was varied from 2500 to 4500. This

Theoretical investigation for convective heat transfer on Cu/water nanofluid and (SiO2copper)/water hybrid nanofluid with MHD and nanoparticle shape effects comprising relaxation and contraction phenomenon Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201123
Naheeda Iftikhar; Abdul Rehman; Hina SadafA methodological approach has been adopted in order to investigate the magnetohydrodynamic (MHD) flow of (CuSiO2)/water hybrid nanofluid keeping in view the peristaltic motion. An endeavor is made to obtain accurate results of velocity slip and convective boundary conditions while studying four different types of geometric shapes (sphere, bricks, cylinder and platelets). The formulated equations are

Experimental study of plate materials for evaporative air coolers Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201123
Demis Pandelidis; Anna Pacak; Aleksandra Cichoń; Wojciech Gizicki; William Worek; Sabri CetinFollowing paper presents an experimental study on eight potential plate materials for evaporative air coolers. There are three groups of materials: currently used plate materials (kraft papers), new natural origin plate materials (cotton fibers), and new synthetic plate materials (synthetic fibers). Proposed materials were examined in terms of different properties such as upward and downward distribution

Forced convection with unsteady pulsating flow of a hybrid nanofluid in a microchannel in the presence of EDL, magnetic and thermal radiation effects Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201121
Sohail Ahmed; Hang XuAn unsteady force convection flow of a hybrid nanofluid flow driven in a microchannel by an applied timedependent periodic pressure gradient in the presence of electric double layer, magnetic field, and thermal radiation effects is studied. Few attentions have been paid to investigate such pressure driven flow in microscale though they could be very important in practical applications. In our configuration

Nonmagnetized mixed convective viscous flow submerged in titanium oxide and aluminum titanium oxide hybrid nanoparticles towards a surface of cylinder Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201121
Fazal Haq; M. Ijaz Khan; YuMing Chu; Niaz B. Khan; Seifedine KadryHybrid nanofluids are novel fluids created by suspending two or more dissimilar nano sized particles in base fluids. Thermal conductivity of hybrid nanofluids is more than nanofluids. Now a day, due to high thermal conductivity and applications in engineering and industry, hybrid nanofluids have become attractive area of research for scientist and researchers. The main objective of current communication

A novel method of enhancing convective heat transfer by dynamic controlling rib Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201120
Pengyong Xie; Xiaobing ZhangNew and efficient mixing heat technology is increasingly demanded for many industrial fields. This paper proposed a novel technique of enhancing convective heat transfer by dynamic controlling rib and investigated several cases of vibration rib controlling flow. The study results of heat transfer coefficient, temperature and turbulent intensity indicate that dynamic flow control is an efficient heat

A novel curvedcorrugated channel model: Thermalhydraulic performance and design parameters with nanofluid Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201120
Raheem K. Ajeel; K. Sopian; Rozli ZulkifliIn this study, flow structure and heat transfer characteristics of the novel channel, namely: the curvedcorrugated channel, are numerically studied using ZnOwater nanofluid and the presence of Eshaped baffles. The influences of corrugations, baffles, and geometric parameters; gap ratio (GR = 0.2,0.3,0.4, and 0.5), blockage ratio (BR = 0.2,0.25,0.3, and 0.35), and pitch angle (β = 10°, 12.5°, and

Thermal design evaluation of ribbed/grooved tubes: An entropy and exergy approach Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201120
Mohamed L. Elsayed; Mohamed A. Abdelatief; Saeed A. Ahmed; Mohamed S. Emeara; Wael M. ElwanThe smooth circular tubes are typically used in aircooled heat exchangers systems. In literature, various research toward improving the hydraulic/thermal performance by changing the tubes' inner surface topology is found. In the current work, fluid friction and heat transfer characteristics of aircooled tube heat exchangers with installed ribs and grooves have been numerically compared. Initially

Thermal entry flow of powerlaw fluid through ducts with homogeneous slippery wall(s) in the presence of viscous dissipation Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201120
Muhammad Waris Saeed Khan; Nasir AliThis article investigates the Graetz problem for an inelastic powerlaw fluid by incorporating the effects of homogeneous slippery surface(s). The energy equation with viscous dissipation term is handled by employing the separation of variable method supplemented with the Matlab based algorithm Bvp4c for both kinds of thermal conditions, namely isothermal and isoflux conditions. The graphical results

Compuational study on transport of thermal energy and mass species in power law rheological fluid with hybrid nanostructures in the presence of chemical reaction Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201120
M. Nawaz; U. Nazir; Sayer Obaid Alharbi; Yasser ElmasryPower law rheological model is used for mathematical modeling of simultaneous transport of heat and energy via hybrid nanoparticles distributed in heat generating fluid exposed to magnetic field. Governing conservation laws, correlation between thermosphysical properties fluid, solid particles, suitable noslip momentum and temperature boundary conditions are provided system of boundary value problems

Effects of Reynolds number, plastic number, and flow intensity on the flow and on the heat transfer of a viscoplastic fluid flowing through a planar expansion followed by a contraction Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201119
Luiz Paulo Borges Miranda; Daniel Dall'Onder dos Santos; Flavia Schwarz Franceschini ZinaniNonNewtonian fluids are a constant presence in several industrial applications so it becomes interesting to understand their behavior and to optimize their use. One behavior of commercial interest is the viscoplastic behavior characterized by an abrupt change of the apparent viscosity when a certain amount of stress is achieved. The present work performs a study of the effect of Reynolds number, the

Evaluation of vorticity forces in thermosensitive cavitating flow considering the local compressibility Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201119
Tangjun Shen; Xiaojun Li; Linmin Li; Zhengdong Wang; Yaoyao LiuThe correlation between hydrodynamic forces and cavity evolution has been widely investigated but has not been deeply revealed. This study uses force element method to analyse the characteristics of force evolution along with cavitation around a NACA0015 hydrofoil. A modeling framework using the mixture twophase flow model considering the energy convection and compressibility is proposed, to investigate

Experimental determination of cooling and spray characteristics of the water electrospray Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201119
Rıdvan Yakut; Kenan Yakut; Edward Sabolsky; John KuhlmanOver the last two decades, the dimensions of electromechanical systems have decreased to micro, even nano scale, as well as the capacity of these systems has increased, leading to the gradual increase of heat flux density. Hence, the conventional cooling methods cannot completely remove heat from the surface. Electrospray cooling is a novel method used in high heat flux systems with small surface area

Flow of nanoliquid past a vertical plate with novel quadratic thermal radiation and quadratic Boussinesq approximation: Sensitivity analysis Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201119
B. Mahanthesh; Joby MackolilThe effects of quadratic thermal radiation and quadratic Boussinesq approximation are investigated on the heat transport of a 36 nm Al2O3 − H2O nanofluid over a vertical plate. The modified Buongiorno model is used in the analysis that includes the effectual thermophysical properties of the nanofluid and the key slip mechanisms. Experimentally verified correlations are used for the thermophysical properties

Nonorthogonal stagnation point flow of Maxwell nanomaterial over a stretching cylinder Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201118
A. Abbasi; F. Mabood; W. Farooq; Z. HussainOblique stagnation point flow of incompressible Maxwell nanofluid past a stretching cylinder with active and passive controlled nanoparticles concentration condition is discussed numerically. The suitable coordinate decomposition reduce the governing boundary layer equations into the system of nonlinear ordinary differential equations which are approximated by Keller box procedure for several values

Lattice Boltzmann study of bubble dynamics and heat transfer on a hybrid rough surface with a cavitypillar structure Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201116
Shakeel Ahmad; Chika Eze; Huaqiang Liu; Jiyun ZhaoIn this work, a twodimensional phasechange lattice Boltzmann model is used to investigate the pool boiling from a hybrid rough surface with a single cavity and one or two pillars on the superheated plate for an entire ebullition cycle. The bubble growth and departure dynamics on the hybrid pillared cavity surfaces, namely a singlepillared cavity surface (a surface with one cavity and one neighbouring

Efficient DSBGK simulations of the low speed thermal transpiration gas flows through microchannels Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201116
Jun Li; Chunpei Cai; ZhiHui LiLow speed thermal transpiration gas flows through microchannels are simulated by the direct simulation BGK (DSBGK) method that is based on the BhatnagarGrossKrook model equation. Different from the ordinary application of BGK equation having the viscosity matched, we selected its relaxation time according to the thermal conductivity coefficient and thus significantly improved the accuracy. In comparing

Dual nature solutions of waterbased carbon nanotubes along a shrinking surface in the presence of thermal radiation and viscous dissipation Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201117
Rizwan Ul Haq; T. Sajjad; M.Z. Ullah; A.S. Alshomrani; Iskander TliliThe current analysis is performed to find the dual nature solutions of MHD (magnetohydrodynamic) waterbased carbon nanotubes (CNTs) over a shrinking sheet. This phenomenon contains other important effects such as: laminar, incompressible, porous media, thermal radiation and viscous dissipation. The sheet is shrinking along xaxis and fluid is dealing for the boundary domain. The governing partial

Threedimensional characterization of airflow, heat and mass transfer in a slotventilated enclosure Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201117
Neha Gupta; A.K. Nayak; B. WeigandThe performance of the fluid flow, heat and contaminant transfer is numerically experimented in a slotventilated container in which the flow in and out are occurred through inlet and exit ports in combination with thermosolutal sources. The inlet source of cold air is mechanically flushed in through left vertical wall to generate mixed convection flow regime combined with the buoyant force produced

Aspects of constructive/destructive chemical reactions for viscous fluid flow between deformable wall channel with absorption and generation features Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201117
Nargis Khan; Kamel AlKhaled; Anum Khan; Muhammad Sadiq Hashmi; Sami Ullah Khan; M. Ijaz Khan; Sumaira QayyumThe determination of contemporary study is to explore the combine effect of transfer of heat and chemical reaction on the flow through a semiinfinite asymmetric channel having orthogonally expanding or contracting porous wall. The boundary condition corresponds to the existence of convection heating is also considered. The mathematical equations represents the present flow problems are compact to

CattaneoChristov double diffusions and entropy generation in MHD second grade nanofluid flow by a Riga wall Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201116
Tasawar Hayat; Faisal Shah; Ahmed AlseadiThis article addresses the (MHD) magnetohydrodynamic flow of second grade nanofluid. Stagnation point flow towards a stretched Riga wall is examined. Heat and mass transfer analyses are based upon CattaneoChristov (CC) theory. These considerations are entirely different than classical heat and mass fluxes by Fourier and Fick's laws. In addition, the convective condition of heat transfer is involved

Selfactivated elastocapillary wave promotes boiling heat transfer on soft liquid metal surface Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201116
Chunlei Cao; Xiaojing Ma; Xiaotian He; Jinliang Xu; Jian Xie; Guohua Liu 
Simulation of entropy optimization and thermal behavior of nanofluid through the porous media Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201116
Zahir Shah; M. Sheikholeslami; Ikramullah; Poom KumamHydrothermal behavior of hybrid nanomaterial migration from a perforated and wavy container is analyzed by taking into account the impacts of Lorentz force and constant heat flux. The nonDarcy model incorporates the effects due to medium porosity. Suitable relations are used to transform the developed set of PDEs to nondimensional form. The flow is simulated by employing the standard computational

Effects of liquid film thickness and surface roughness ratio on rapid boiling of water over copper plates Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201114
Pu Bai; Leping Zhou; Xiaoze DuThis work investigated the effect of liquid film thickness and surface roughness ratio on the rapid boiling of water over the copper plates in terms of hydraulic diameter defined based on the overall crosssectional area available for the flow of water film. It is found that the reduction of the hydraulic diameter by increasing the surface roughness ratio can substantially promote the performance of

Numerical simulation of nanoparticles size/aspect ratio effect on thermal conductivity of nanofluids using lattice Boltzmann method Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201114
Hamed Tahmooressi; Alibakhsh Kasaeian; Adel Yavarinasab; Ali Tarokh; Mahan Ghazi; Mina HoorfarRecent developments in nanofluids have led to a renewed interest in the geometrical effects of nanoparticles on the effective thermal conductivity (ETC) of nanofluids. Although the experimental data for the effect of nanoparticles shapes (the aspect ratio) on ETC are quite consistent, there are still controversial results regarding the effect of the nanoparticles size. Theoretical approaches have been

Natural convection in a wavy porous cavity subjected to a partial heat source Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201114
P.S. Rao; Prabir BarmanThis numerical study of natural convection represents cooling of a heat source embedded in a wavy cavity. The right side wall, which is wavy, kept at a fixed ambient temperature where as partial heat source with constant heat flux is placed at the right wall and other walls are kept adiabatic. The nondimensional governing equations which describe the flow pattern are solved by finite difference method

Solute dispersion in micropolarNewtonian fluid flowing through porous layered tubes with absorbing walls Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201113
Pallav Dhanendrakumar Shah; Ashish Tiwari; Satyendra Singh ChauhanThe physical mechanism of heat and mass transfer in solute dispersion in a twofluid model of the blood flow through porous layered tubes with absorbing walls has been studied in the present work. For a more realistic representation of the blood flow in microvessels, the twofluid approach is employed by considering the fluid in which the blood particles like RBCs, WBCs, and platelets are suspended

Coupling management optimization of temperature and thermal stress inside 3DIC with multicores and various power density Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201113
Bin Ding; ZhiHao Zhang; Liang Gong; ChuanYong Zhu; MingHai XuA threedimensional integrated circuit (3DIC) is representative of technologies that have achieved the “beyond Moore's Law” concept. However, a 3DIC suffers from the thornier problems of local overheating and thermal stress concentration as a result of its higher integration. Herein, a 3DIC model with a real microprocessor structure to explore the temperature and thermal stress distributions under

Empirical characterization of verticaltube inlets in hotwater storage tanks Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201112
Joseph D. Rendall; Kyle R. Gluesenkamp; William Worek; Ahmad AbuHeiba; Kashif Nawaz; Tony GehlHotwater storage in residential and commercial tanks is of growing interest for peakshifting the electrical demand associated with hotwater loads. How the water enters the tank can significantly affect the extraction efficiency of the storage. Verticaltube inlets (VTIs) direct cold water into the tank. The VTI design influences whether largescale mixing occurs, which can reduce the delivery capacity

Effect of heat generation and heat absorption on natural convection of Cuwater nanofluid in a wavy enclosure under magnetic field Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201112
Ammar Abdulkadhim; Hameed K. Hamzah; Farooq Hassan Ali; Çağatay Yıldız; Azher M. Abed; Esam M. Abed; Müslüm ArıcıTaking a more complex engineering geometry into account, magnetohydrodynamic natural convection of nanofluid (Cuwater) in a wavy walled enclosure having a circular hot cylinder inside is investigated by employing Galerkinweighted residual formulation. In order to investigate the flow and heat transfer characteristics from several perspectives and increase the ability of adaptation to various engineering

Heat transfer enhancement through longitudinal vortex generators in compact heat exchangers with flat tubes Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201110
José Carpio; Alvaro ValenciaThe thermal performance of a compact heat exchanger with flat tubes was numerically investigated in a laminar regime by introducing longitudinal vortex generators (LVG) in arrays comprising: 9 alternating, 18 alternating, 18 aligned, 27 alternating and 39 alternating LVG. Vortex generators, in the form of delta winglets with an angle of attack of 35o, were used. For each geometry, the local heat flux

Study of laminar convection heat transfer in singlesideheating smallscale cooling channel with vibration cylinder Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201110
Pengyong Xie; Xiaobing ZhangTraditional enhancing convective heat transfer methods are mainly based on the flow turbulence by vortex generators, however, with increasingly heat transfer needs, traditional stationary vortex generators have not met the cooling demand. Thus, active flow control technique is proposed to better enhance convective heat transfer performance. The vibration cylinder is set as a vortex generator to achieve

Ultrasonic assisted new Al2O3@TiO2ZnO/DW ternary composites nanofluids for enhanced energy transportation in a closed horizontal circular flow passage Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201109
Waqar Ahmed; S.N. Kazi; Z.Z. Chowdhury; Mohd Rafie Bin Johan; Manzoore Elahi M. Soudagar; M.A. Mujtaba; M. Gul; Irfan Anjum Badruddin; Sarfraz Kamangar 
Transportation of Marangoni convection and irregular heat source in entropy optimized dissipative flow Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201109
M. Ijaz Khan; Sumaira Qayyum; YuMing Chu; Niaz B. Khan; Seifedine KadryThis paper is about entropy generation in Marangoni convective flow due to rotating disk with irregular heat source. Nonlinear mixed convection radiative flow is considered here. Exponential base heat source is addressed. Subsequent equations are transformed to the ODE's by using generalized Karman's variables. Results are found by using NDSolve MATHEMATICA. Through graphical illustration velocity

Numerical investigation of singleblow transient testing technique Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201109
Zhiyong Wu; Siqi Xu; Lixin Yang; Zhifeng WangThe singleblow transient testing technique has been used for more than 50 years, and many correlations have been proposed from this technique. However, these correlations differ significantly from one another and the behind reasons are still unknown. In this study, we used numerical simulation to detect the detailed temperature evolution of an entire porous matrix during the singleblow experiment

Significance of quadratic thermal radiation and quadratic convection on boundary layer twophase flow of a dusty nanoliquid past a vertical plate Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201109
B. Mahanthesh; Joby Mackolil; M. Radhika; Wael AlKouz; SiddabasappaBoundary layer twophase flow of particulate Al2O3H2O nanoliquid over a vertical flat plate is studied numerically subjected to the aspects of quadratic thermal convection and quadratic thermal radiation. The KhanaferVafaiLightstone monophasic nanofluid model (KVL model) and Saffman's dusty fluid model are used for the equations governing the flow of dusty nanoliquids. The quadratic Boussinesq approximation

The entropy generation analysis of forward and backward laminar water flow in a platepinfin heatsink considering three different splitters Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201109
Amin Shahsavar; Omid Yari; Ighball Baniasad AskariThe application of splitters has been proven to be useful to control the separated wake downstream of the pinfins. This paper aims to evaluate the thermal (Ṡth) and frictional (Ṡf) irreversibility rates in the fluid flow inside the platepinfin heatsinks (PPFHSs). To this end, the numerical analysis of forward and backward water flow inside the PPFHS with three different attached splitters was

Dynamics of fluid flow through SoretDufour impacts subject to upward and downward motion of rotating disk Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201109
S.A. Shehzad; Z. Abbas; A. Rauf; Zahra AbdelmalekFlow features are encountered through numerical way using central finite differences approximations and Successive over Relaxation (SOR) method. Fluid flow is generated due to disk rotation, which moves in vertical direction both up and down. Similarity variables are accomplished in such a way that similarity equations can be limited to those communicated in viscous pumping analysis of traditional

FalknerSkan timedependent bioconvrction flow of cross nanofluid with nonlinear thermal radiation, activation energy and melting process Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201107
Hassan Waqas; Shan Ali Khan; Sami Ullah Khan; M. Ijaz Khan; Seifedine Kadry; YuMing ChuOwing to the dyanamic applications of nanoparticles in various biomedical and engineering apllications like cancertheropy, microelectronics, energy storage devices, cooling and heating processes, the researchers have intended their focus toward this topic. On this end, the motivating objective of current communication is to investigate the FalknerSkan bioconvection flow of cross nanofluid conformist

A probability model for predicting the bubble size distribution in fully developed bubble flow in vertical pipes Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201107
Haixiao Liu; Tao Tian; Rong KangBubble flow has good characteristics of mass and heat transfer, and is widely used in industrial practice. In bubble flow, the gas phase is mixed with the liquid phase in the form of bubbles. The gasliquid twophase structure of bubble flow is investigated by analyzing the motion and force states of bubbles. The most crucial bubble behaviors include the bubble collision and breakup, which continuously

A threedimensional thermal analysis and optimization of square light edding diode subcomponents Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201107
Mohamed Bechir Ben Hamida; Kamel Charrada; Mohammed A. Almeshaal; Ali ChamkhaThe purpose of this paper is to assess thermal management and optimization of several parameters such as: materials, size and thickness of all subcomponents of singlechip Light Emitting Diode (LED) in order to minimize its junction temperature and thereby maximizing light output and device reliability. For this, we developed a threedimensional code using Comsol Multiphysics that solves the systems

Surface modification of transversely twistedturbulator using perforations and winglets: An extended study Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201106
Morteza KhoshvaghtAliabadi; M. Farsi; S.M. Hassani; Nidal H. AbuHamdeh; Ashkan AlimoradiTwistedturbulators are effective passive techniques for enhancing the thermal performance of heat exchangers. Although numerous studies have been conducted on longitudinal forms, there are very scarce studies on transverse forms. In this study, particular attention is paid on the effects of perforation, winglet, and a combination of both, as modifications, on the performance of transversely twistedturbulators

Droplet stretching between hydrophobic and hydrophilic plates: Droplet fluid heating Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201105
Abdullah AlSharafi; Bekir S. Yilbas; Ahmet Z. Sahin; H. AlQahtani 
Numerical investigation of porosity effect on a PCM's thermal performance in a porous rectangular channel via thermal lattice Boltzmann method Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201104
Riheb Mabrouk; Hassane Naji; Hacen Dhahri; Sihem Hammouda; Zohir YounsiThis paper performs a numerical assessment of the porosity effect on heat transfer under forced convection in an openended horizontal channel filled with a porous structure and a phase change material (PCM). To take into account forced convection between the solid matrix and the PCM, the dimensionless DarcyBrinkmanForchheimer equations and the local thermal nonequilibrium condition are considered

Thermodynamic and mathematical analysis of modified Luikov's equations for simultaneous heat and mass transfer Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201104
S. VargasGonzález; K.S. NúñezGómez; E. LópezSánchez; J.M. TejeroAndrade; I.I. RuizLópez; M.A. GarcíaAlvaradoInterface thermodynamic and mathematical analysis of modified Luikov equations (MLEs) for simultaneous heat and mass transfer in solids were developed. The thermodynamic relations at interface show that air(wet solid) equilibrium relation may be mathematically approximated by two linear segments. These linear relations conduced to the possibility that MLEs have analytical solution for 1D rectangular

Identification of nonlinear characteristics of thermoacoustic oscillations in helium piping systems Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201103
Lulu Hu; Qingshan Liu; Peng Yang; Yingwen LiuInsufficient dynamic information on helium piping systems limits our ability to understand and identify thermoacoustic oscillation (TAO) phenomena in these systems. In this study, we investigate the associated oscillation behaviours and the effects of the temperature distribution steepness, S, and the inflection point position, x0, on the TAO characteristics through numerical simulations. The results

Mixed convection heat transfer of molten salt outside coiled tube Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201103
Zijian Huang; Yukun Zou; Xiaolan Wei; Jing Ding; Jianfeng LuMixed convection heat transfer of molten salt outside coiled tube in cylinder tank was experimentally reported with Reynolds number 418–2175 and Prandlt number 5.7–8.8. Nusselt number of salt outside coiled tube was significantly higher than that inside tube, and its tendency had good agreement with available heat transfer correlations for fluid crossing tube. The heat transfer between salt and coiled

Combined impacts of heat source/sink, radiative heat flux, temperature dependent thermal conductivity on forced convective Rabinowitsch fluid Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201103
YuMing Chu; Mubbashar Nazeer; M. Ijaz Khan; Farooq Hussain; Huma Rafi; Sumaira Qayyum; Zahra AbdelmalekThe current study deals with the properties of thermal radiation, heat generation and the effect of convective boundary conditions through a duct with the Rabinowitsch fluid. The thermal conductivity is also taken as a function of temperature. The exact solution of velocity distribution is presented with the help of symbolic software Maple. Due to existence of thermal radiation, heat generation and

General correlations for gasliquid mass transfer in laminar slug flow Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201103
M.C.F. Silva; J.B.L.M. Campos; J.D.P. AraújoMass transfer is an important phenomenon that can be highly leveraged through hydrodynamics. Slug flow is frequently associated with the enhancement in transport phenomena, and so, mass transfer from a single Taylor bubble to the flowing liquid is numerically studied. This CFD work validates a recently published study using pure oxygen bubbles and expands it to pure bubbles of other compounds (different

Fuzzy logic to thermal and friction characteristics of turbulent airflow over diamondshaped turbulators Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201103
Reza Beigzadeh; Smith EiamsaardThe research tries to apply a fuzzy logic approach to approximate the airflow thermal characteristic and flow friction for the turbulent regime in a heat exchanger equipped by diamondshaped (Dshape) turbulators with arrangements in tandem. The variables studied in the work are Reynolds number within the range of 3500 to 16,500, three cone angles (θ), and three tail length ratios (TR). The heat transfer

Comments on “New insight into the definitions of the Bejan number” Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201103
Michele Trancossi; Jose Pascoa; Giuseppe CannistraroThese notes aim to increase the awareness of the concept of Bejan Number among the readers of International Communications in Heat and Mass Transfer. They refer to the paper of Zimparov et al. because the authors, in their outstanding commentary on Bejan number neglect both the possible confusion which may arise between Hagen Number and Bejan number and the more recent outcomes which opens a new direction

Fluid–thermal–structural coupling investigations of opposing jet in hypersonic flows Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201103
Liu Hongpeng; Wang ZhenguoAs one of active cooling method, opposing jet shows its advantages on the aerodynamic thermal reduction for hypersonic flight. To accurately predict its thermal protection features, a fluidthermalstructural coupling strategy is adopted for a cone body with opposing jet, with a nose radius of 6 mm and jet radius of 0.6 mm. The related turbulent model and coupling method is validated by comparison

A dimensionless study on thermal control of positive temperature coefficient (PTC) materials Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201103
RuoJiang Wang; YuHui Pan; WenLong ChengPositive temperature coefficient (PTC) material is widely used in the field of thermal control due to its unique temperature sensitive characteristics. However, there is no general criterion about PTC material thermal control at present due to the lack of theoretical analysis in the previous works. Thus, in this paper, the dimensionless method is used to study PTC material adaptive thermal control

Electromagnetic flow of SWCNT/MWCNT suspensions with optimized entropy generation and cubic auto catalysis chemical reaction Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201103
M.K. Nayak; F. Mabood; A.S. Dogonchi; W.A. KhanA boundary layer analysis of three dimensional electromagnetic flows of single and multi walls carbon nanotubes over the surface of a thin needle is addressed. Both single wall (SWCNTs) and multi wall (MWCNTs) are considered as nanoparticles whereas water is considered as base liquid. The energy equation is modeled by using nonlinear thermal radiation because it has a major impact on the solar energy

Simultaneous reconstruction of nonlinear temperaturedependent properties in a 1D radiationconduction medium Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201101
M. Pakdaman; S. Payan; S.M.H. Sarvari; S. MohammadpourIn this paper, a set of new data is proposed for the simultaneous reconstruction of thermal radiation and conduction properties in a radiationconduction medium into the onedimensional layer. The radiation problem is modeled by the modified discrete ordinates method, and the conductionradiation heat transfer problem is solved via the finite volume approach. The inverse problem is solved using the

Role of bioconvection in a three dimensional tangent hyperbolic partially ionized magnetized nanofluid flow with CattaneoChristov heat flux and activation energy Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201101
Muhammad Ramzan; Hina Gul; Seifedine Kadry; YuMing ChuA new mathematical model is envisaged that discusses the flow of the threedimensional Tangent hyperbolic nanofluid flow with Hall current and Ion slip influenced by a strong magnetic field past a stretching sheet. The heat transmission phenomenon is analyzed in attendance of modified Fourier law amalgamated with Newtonian heating, the Arrhenius activation energy, and chemical reaction. The induction

Numerical modelling of a parallel flow heat exchanger with twophase heat transfer process Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201031
Nidal H. AbuHamdeh; Elias M. SalilihIn this analysis a 1D steady state heat transfer was accomplished for tube and shell type heat exchanger with parallel flow configuration. Molten salt was regarded as a secondary flow that runs in the shell part of the heat exchanger whereas the saturated water was regarded as the primary flow that flows in the tube part of heat exchanger. The analysis is done for 0.1 kg/s mass flow rate of the primary

Heat transfer analysis in convective flow of Jeffrey nanofluid by vertical stretchable cylinder Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201031
T. Hayat; Habib Ullah; B. Ahmad; M.Sh. AlhodalyThis paper studies the magnetohydrodynamic (MHD) flow of unsteady Jeffrey nanofluid due to vertical stretchable cylinder. Joule heating and thermal radiation outcomes are additionally addressed. The Buongiorno model is utilized to describe the characteristics of nanofluid. The mathematical form of the problem consists of momentum, continuity, concentration, and energy equations. Suitable transformations

Semimechanistic prediction of spatial variation of local critical heat flux along a slightly inclined downwardfacing surface Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201028
Uiju Jeong; Sung Joong KimA semimechanistic critical heat flux (CHF) model has been developed based on own experimental data. It is the first model, which can predict a spatial variation of the local CHF along a 10° inclined flat surface facing downward. To model the slug flow within the twophase boundary layer, the present work modified several fundamental variables of the original Cheung and Haddad's model and they are

Analyzing regularity of interpolar air motion and heat dissipation coefficient distribution of a salient pole synchronous generator considering rotary airflow Int. Commun. Heat Mass Transf. (IF 3.971) Pub Date : 20201022
Dan Li; Weili Li; Jinyang Li; Xiaoke LiuThe extreme attention should be paid to cooling performance of aircooled synchronous generators in order to ensure that the temperature rise of each part is within the allowable range. It is necessary to know losses distribution, cooling airflow rate distribution laws, heat dissipation coefficient distribution and temperature distribution characteristics. Considering the influence of rotary airflow