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Magnetohydrodynamic ternary hybrid nanofluid slip flow past a permeable shrinking sheet: boundary layer flow control and optimization using response surface methodology Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2025-02-13 Nur Syahirah Wahid, Shahirah Abu Bakar, Mohd Shafie Mustafa, Norihan Md Arifin, Ioan Pop
Purpose Magnetohydrodynamics (MHD) in nanofluids is crucial in boundary layer flow as it enables the manipulation of fluid motion through magnetic fields, which leads to improved stability and efficiency. This study aims to introduce a model and solutions for the boundary layer flow of a ternary hybrid nanofluid past a permeable shrinking sheet, integrating both magnetohydrodynamic and slip effects
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Effect of rotation and voids on reflection of plane waves in a transversely isotropic magneto-thermoelastic half-space under GN-II model Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2025-02-12 Reetika Goyal, Sunita Deswal, Kapil Kumar Kalkal
Purpose In the framework of GN-II theory, this paper aims to address the plane wave propagation in a two-dimensional homogeneous, transversely isotropic magneto-thermoelastic medium with rotation and voids. Design/methodology/approach To investigate the problem, the fundamental governing equations are modified in the purview of Green-Naghdi theory without energy dissipation. These equations are converted
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Exploring the impact of morphological nanolayers on mixed convection in MHD nanofluids through a neurocomputational approach Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2025-02-11 Faisal, Aroosa Ramzan, Moeed Ahmad, Waseem Abbas
Purpose This study aims to develop a neurocomputational approach using the Levenberg–Marquardt artificial neural network (LM-ANN) to analyze flow and heat transfer characteristics in mixed convection involving radiative magnetohydrodynamic hybrid nanofluids. The focus is on the influence of morphological nanolayers at the fluid–nanoparticle interface, which significantly impacts coupled heat and mass
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The effect of lateral position of heating surface and angular orientation of latent heat thermal energy storage system on the melting characteristics: a numerical investigation Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2025-02-06 Himanshu Kumar, Gurjeet Singh, Ankit Yadav, Müslüm Arici
Purpose This study aims to address the low thermal conductivity and suboptimal performance of phase change materials (PCMs) by examining the impact of geometric adjustments on their melting rate. Design/methodology/approach A two-dimensional numerical model was created to investigate the effect of different positions and angular inclinations of the inside heating surface (IHS) on the melting rate of
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Investigation of temperature jump, first and second-order velocity slip effects on blood-based ternary nanofluid flow in convergent/divergent channels Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2025-02-05 Tunahan Gunay, Duygu Erdem, Ahmet Ziyaettin Sahin
Purpose High surface area-to-volume ratios make nanoparticles ideal for cancer heat therapy and targeted medication delivery. Moreover, ternary nanofluids (TNFs) may possess superior thermophysical properties compared to mono- and hybrid nanofluids due to their synergistic effects. In light of this information, the objective of this article is to examine the blood-based TNF flow within convergent/divergent
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Three-dimensional analysis of turbulent twin-swirling jets onto a heated rectangular prism in a channel Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2025-01-30 Muhammed Gur, Hakan Oztop, Nirmalendu Biswas, Fatih Selimefendigil
Purpose The purpose of this study is to investigate the impact of swirling jet flow on the cooling performance of a heated rectangular prism placed within a channel. The primary aim is to explore the influence of varying aspect ratios (AR) of the prism and different fluid Reynolds numbers (Re) on the cooling efficiency. Design/methodology/approach The numerical analysis is performed using a finite
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On a holistic investigation of implicit/explicit/semi-implicit GS4-I framework and time step control for unsteady fluid dynamics Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2025-01-27 Yazhou Wang, Kumar K. Tamma, Dean J. Maxam, Tao Xue
Purpose This paper aims to design and analyze implicit/explicit/semi-implicit schemes and a universal error estimator within the Generalized Single-step Single-Solve computational framework for First-order transient systems (GS4-I), which also fosters the adaptive time-stepping procedure to improve stability, accuracy and efficiency applied for fluid dynamics. Design/methodology/approach The newly
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Mixed convection in a partially and differentially heated cavity − a finite volume complete flux analysis Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2025-01-28 B. V. Rathish Kumar, Chitranjan Pandey
Purpose The purpose of this study is to derive a physics based complete-flux approximation scheme by solving suitable nonlinear boundary value problems (BVP) for finite volume method for mixed convection problems, to study the mixed convection phenomenon inside partially and differentially heated cavity for various sets of flow parameters. And, to study the impact of source terms on the cell-face fluxes
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The role of flow angle in mixed convection and vortex-induced vibration of a thermally controlled elastic cylinder Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2025-01-23 Mostafa Esmaeili, Hossein Fakhri Vayqan, Amir Hossein Rabiee
Purpose This study aims to investigate the effects of thermal buoyancy and flow incidence angles on mixed convection heat transfer and vortex-induced vibration (VIV) of an elastically mounted circular cylinder. The focus is on understanding how varying these parameters influences the vibration amplitudes in both the x and y directions and the overall heat transfer performance. Design/methodology/approach
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Numerical investigation of wave dynamics in laminar falling films: influence of Kapitza number and inclination angle Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2025-01-23 Yuanxiang Chen, Jian Zheng, Yue Liu, Asensio Oliva Llena, Jesus Castro Gonzalez
Purpose This study aims to optimize the design of falling film heat exchangers by providing a deeper understanding of wave characteristics and capillary flow in laminar inclined falling films at low Reynolds numbers. The focus is on the effects of different Kapitza numbers, influenced by fluid properties and inclination, on the interfacial wave behavior. Design/methodology/approach A numerical investigation
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Boundary and interior layer phenomena in coupled multiscale parabolic convection–diffusion interface problems: efficient numerical resolution and analysis Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2025-01-22 Aishwarya Jaiswal, Sunil Kumar, Higinio Ramos
Purpose This paper aims to study boundary and interior layer phenomena in coupled multiscale parabolic convection–diffusion interface problems and to present their efficient numerical resolution and analysis. Design/methodology/approach This study includes cases in which the diffusion parameters are small, distinct and can differ in order of magnitude. The source term is considered to be discontinuous
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Influence of radiative heat transfer on hybrid nanofluid across a curved surface with porous medium Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2025-01-21 Roopa K.R., Dinesh P.A., Sweeti Yadav, Oluwole Daniel Makinde
Purpose The purpose of this study is to examine how fluid flow and heat transfer are affected by the influence of hybrid nanofluids flowing across a stagnation zone of a stretching curved surface. Stagnation point flow has garnered considerable attention over the past few decades. This is because many technical applications, such as the cooling of nuclear reactors and rotating equipment divisions,
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Optimizing bioconvective heat transfer with MHD Eyring–Powell nanofluids containing motile microorganisms with viscosity variability and porous media in ciliated microchannels Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2025-01-16 Junaid Mehboob, R. Ellahi, Sadiq M. Sait, Noreen Sher Akbar
Purpose This paper aims to optimize bioconvective heat transfer for magnetohydrodynamics Eyring–Powell nanofluids containing motile microorganisms with variable viscosity and porous media in ciliated microchannels. Design/methodology/approach The flow problem is first modeled in the two-dimensional frame and then simplified under low Reynolds number and long wavelength approximations. The numerical
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Numerical research on two typical flow structures and aerodynamic drag characteristics of blunt-nosed trains Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2025-01-16 Sha Zhong, Mingzhi Yang, Bosen Qian, Lei Zhang, Dongqing He, Tongtong Lin, Fue-Sang Lien
Purpose This study aims to provide new insights into aerodynamic drag reduction for increasingly faster blunt-nosed trains, such as urban and freight trains. Specifically, this work investigates two distinctly different wake structures and associated aerodynamic drag of blunt-nosed trains. Design/methodology/approach Three typical cases of blunt-nosed trains with 1-, 2- and 3-m nose lengths are selected
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Rayleigh-type wave in thermo-poroelastic media with dual-phase-lag heat conduction Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2025-01-15 Manjeet Kumar, Priyanka Lather, Li-Yun Fu, Neelam Kumari, Pradeep Kaswan, Li Nianqi, Manjeet Kumari
Purpose The purpose of this paper is to investigate the propagation of Rayleigh-type surface wave in a porothermoelastic half-space. This study addresses the impact of surface pores characteristics, specific heat, temperature, porosity, wave frequency, types of rock frame and types of pore fluids on the propagation characteristics of Rayleigh-type wave. Design/methodology/approach A secular equation
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Entropy analysis of convective nanofluid flow with Brownian motion in an annular space between confocal elliptic cylinders Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2025-01-14 Boussouffi Mustapha, Amina Sabeur
Purpose This study aims to provide an in-depth analysis of entropy generation (EG) during natural convection within the annular space between confocal elliptic cylinders, with a specific focus on the influence of Brownian motion on nanofluid behavior. Design/methodology/approach A finite volume control method was used to conduct a detailed numerical analysis, examining the behavior of various nanofluids
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Rheology of Bingham viscoplastic flow triggered by a rotating and radially stretching disk Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2025-01-14 Mustafa Turkyilmazoglu, Ioan Pop
Purpose This study aims to investigate the flow and heat transfer characteristics of a Bingham viscoplastic fluid subjected to the combined effects of axial rotation and radial stretching of a circular disk. Building upon existing models for Bingham fluids on stationary walls, we extend the formulation to incorporate the effects of a linearly stretching disk using von Kármán similarity transformations
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Enhancement of thermo-hydraulic transport within a round tube using a twisted-staggered concave/convex dimples tape Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2025-01-13 Shiang-Wuu Perng, Horng Wen Wu, Yi-Ling Guo, Tao-Hsuan Liu
Purpose The purpose of this study is to value the thermal and hydraulic transport augmentation of turbulent fluid flow within the round-pipe axis fixed by a twisted-staggered concave/convex dimples tape. Design/methodology/approach This study meets the report’s novel design by axis-inserting a twisted plastic tape with staggered concave/convex dimples of varying diameters (4 and 6 mm) and depths (1
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Numerical investigation on hydrothermal characteristics of microchannel heat sinks with PCM inserts for effective thermal management applications Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2025-01-13 Naga Ramesh Korasikha, Karthikeya Sharma T, Amba Prasad Rao G
Purpose The purpose of the paper is to develop an efficient thermal management system, which effectively dissipate the heat generated from the electronic devices. The present paper focuses at the modeling of microchannel heat sinks (MCHSs) with phase change materials (PCMs) insets to deal with the fluctuating heat generated from the electronic components. Design/methodology/approach In this paper,
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Enhanced melting dynamics of phase change material (PCM) based energy storage system combining modified fin and nanoparticles under solar irradiation Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2025-01-13 Anjan Nandi, Nirmalendu Biswas
Purpose This study aims to investigate the thermal performance enhancements of phase change materials (PCMs) through the integration of extended fins and CuO nanoparticles under the impact of solar irradiation. The research focuses on improving the melting behavior and thermal efficiency of PCM-based energy storage systems to facilitate the design of more efficient energy storage solutions. Design
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A TVD WAF scheme based on an accurate Riemann solver to simulate compressible two-phase flows Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2025-01-08 Dia Zeidan, Abdelmjid Qadi El Idrissi
Purpose This study aims to propose a robust total variation diminishing (TVD) weighted average flux (WAF) finite volume scheme for investigating compressible gas–liquid mixture flows. Design/methodology/approach This study considers a two-phase flow composed of a liquid containing dispersed gas bubbles. To model this two-phase mixture, this paper uses a homogeneous equilibrium model (HEM) defined by
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A viscous model of wind fields in single-cell tornado-like vortices Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2025-01-06 Sanjay Kumar Pandey, Shruti
Purpose This study aims to generalize the Baker and Sterling’s model (2017) by additionally considering viscous flow and introducing a cylindrical central zone of low pressure. Unlike other models, in which the azimuthal velocity is deduced as a special solution using the variables-separable approach, the novelty in this is that it yields a more general form. Design/methodology/approach Flow is incompressible
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Analysis of heat transfer and AuNPs-mediated photo-thermal inactivation of E. coli at varying laser powers using single-phase CFD modeling Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-12-31 Aimad Koulali, Paweł Ziółkowski, Piotr Radomski, Luciano De Sio, Jacek Zieliński, María Cristina Nevárez Martínez, Dariusz Mikielewicz
Purpose In the wake of the COVID-19 pandemics, the demand for innovative and effective methods of bacterial inactivation has become a critical area of research, providing the impetus for this study. The purpose of this research is to analyze the AuNPs-mediated photothermal inactivation of E. coli. Gold nanoparticles irradiated by laser represent a promising technique for combating bacterial infection
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Study on phase change energy storage process in hot-water oil displacement system with composite fin structure Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-12-24 Qiang Cui, Xiao Liu, Zhen Zhang, Xiaoqin Li, Shasha Yang
Purpose This study aims to propose a new composite metal fin structure to enhance heat transfer efficiency during the phase change energy storage (PCES) process in a hot water oil displacement system. Design/methodology/approach PCES numerical unit is developed by varying the radii of annular fins and the number of corrugated fins. The impact of the finned structure on melting characteristics, energy
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Homogenization methods for thermal study of support structure in laser powder bed fusion (L-PBF) – application to process numerical modeling Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-12-18 Yancheng Zhang, Hugo Behlal, Charles-André Gandin, Oriane Senninger, Gildas Guillemot, Michel Bellet
Purpose This paper aims to report on a homogenized model for the anisotropic thermal conductivity of support structures constructed by the laser powder bed fusion (L-PBF) process, and its application to the numerical simulation of the L-PBF process. Design/methodology/approach Considering both analytical and numerical approaches, the model is developed across a temperature interval encompassing the
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Aerodynamic characteristics of the race car in pitch and roll attitude Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-12-17 Xiaojing Ma, Jie Li, Jun Zhao, Jiliang Chen
Purpose Aerodynamics plays a crucial role in enhancing the performance of race cars. Due to the low ride height, the aerodynamic components of race cars are affected by ground effects. The changes in pitch and roll attitudes during the car’s movement impact its ride height. This study aims to analyze the aerodynamic characteristics of race cars under specific pitch and roll attitudes to understand
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Radiation and heat generation effect on MHD natural convection in hybrid nanofluid-filled inclined wavy porous cavity incorporating a cross-shaped obstacle Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-12-17 Lioua Kolsi, A.M. Rashad, Nirmalendu Biswas, M.A. Mansour, Taha Salah, Aboulbaba Eladeb, Taher Armaghani
Purpose This paper aims to explore, through a numerical study, buoyant convective phenomena in a porous cavity containing a hybrid nanofluid, taking into account the local thermal nonequilibrium (LTNE) approach. The cavity contains a solid block in the shape of a cross (+). It will be helpful to develop and optimize the thermal systems with intricate geometries under LTNE conditions for a variety of
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Evaluation of theoretical models for anisotropic effective thermal conductivity in continuous fiber-reinforced thermoplastic laminates Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-12-13 James T Gayton, Justin Lawrence Lapp
Purpose Continuous fiber-reinforced thermoplastic composites are a class of materials highly valuable for structural applications and modeling of heat transfer within them is critical to the design of their processing methods. However, the fiber reinforcement leads to highly anisotropic thermal conduction. Among a variety of methods to account for anisotropic thermal conductivity, continuum models
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Peristaltic pumping of viscoelastic fluid in a diverging channel: effects of magnetic field and surface roughness Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-12-13 Ashvani Kumar, Anjali Bhardwaj, Dharmendra Tripathi
Purpose Surface properties (smooth or roughness) play a critical role in controlling the wettability, surface area and other physical and chemical properties like fluid flow behaviour over the rough and smooth surfaces. It is reported that rough surfaces are offering more significant insights as compared to smooth surfaces. The purpose of this study is to examine the effects of surface roughness in
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When to perform cloud seeding for maximum agricultural crop yields? A modeling study Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-12-12 Arvind Kumar Misra, Gauri Agrawal, Akash Yadav
Purpose Agricultural crops play a crucial role in food security and require commensurating environmental conditions, including adequate rainfall to ensure optimum growth. However, in the recent past, a reduction in the agriculture crop yield has been observed due to the deteriorating rainfall pattern. This paper aims to present a novel mathematical model to analyze the impact of rainfall on the growth
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Rayleigh waves in thermoelastic medium based on a novel nonlocal three-phase-lag diffusion model with double porosity Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-12-09 Chandra Sekhar Mahato, Siddhartha Biswas
Purpose This paper is concerned with the study of the propagation of Rayleigh waves in a homogeneous isotropic, generalized thermoelastic medium with mass diffusion and double porosity structure using the theoretical framework of three-phase-lag model of thermoelasticity. Design/methodology/approach Using Eringen’s nonlocal elasticity theory and normal mode analysis technique, this paper solves the
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A numerical approach to a two-phase free boundary problem with MPC material in a finite domain Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-12-09 Lipi Jain, Jaya Joshi, Rajeev
Purpose The main purpose of this paper is given below: To present a mathematical model of a two-phase Stefan problem including a moving phase change material and variable thermophysical properties. To find a numerical solution of the problem to discuss the dependence of considered phase change problem on variable thermal conductivity, variable specific heat and Peclet number. Design/methodology/approach
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A conservative degree adaptive HDG method for transient incompressible flows Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-12-06 Agustina Felipe, Ruben Sevilla, Oubay Hassan
Purpose This study aims to assess the accuracy of degree adaptive strategies in the context of incompressible Navier–Stokes flows using the high-order hybridisable discontinuous Galerkin (HDG) method. Design/methodology/approach The work presents a series of numerical examples to show the inability of standard degree adaptive processes to accurately capture aerodynamic quantities of interest, in particular
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Two-phase analysis of blood in microchannel architecture on plasma separation ability with dimensional variance Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-12-05 Amin Khaliq, Byungkwon Lee, Muhammad Ahmad Kamran, Myung Yung Jeong
Purpose This paper aims to study the effects of varying inlet channel angle in a novel microfluidic architecture blood plasma separation ability over range of hematocrit values (5–45%) at multiple flowrates. Design/methodology/approach CAD designs for both micro architectures were designed in SOILWORKS. In the second step, these designs were imported into ANSYS to perform where meshing, model selection
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Full-cycle grids numerical simulation of the performance for newly developed micro turbine engine Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-12-05 Tianhe Zhang, Lihong Wu, Zheng Li, Shewen Liu
Purpose The purpose of this research is to investigate the feasibility of using the components series connection (CSC) method to predict the performance of a newly developed micro turbine engine (MTE) under rated operating condition. Design/methodology/approach The main research object is the MTE with known factory performance parameters, and the finite element method is used to discretize its main
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Electroosmosis-modulated Darcy–Brinkman flow in sinusoidal microfluidic pipe: an analytical approach Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-11-29 Amalendu Rana
Purpose This investigation is devoted to analyze the electroosmotic flow characteristics in a sinusoidal micropipe through a porous medium. This study aims to investigate the impact of surface waviness on Darcy–Brinkman flow in the presence of electroosmotic force, achieved through the unification of perturbation techniques. Design/methodology/approach Analytical approximate solutions for the governing
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Slip flow between corotating disks with heat transfer Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-11-28 Mustafa Turkyilmazoglu
Purpose This study aims to explore the hydrodynamic and thermal behavior of an incompressible fluid flowing between uniformly corotating disks with finite radii. The narrow gap between the disks necessitates accounting for slip flow in the radial direction, departing from the classic no-slip model. Design/methodology/approach The author uses a perturbation approach and derives full analytical approximations
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Quantification analysis of high-speed train aerodynamics with geometric uncertainty of streamlined shape Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-11-28 Hongkang Liu, Qian Yu, Yongheng Li, Yichao Zhang, Kehui Peng, Zhiqiang Kong, Yatian Zhao
Purpose This study aims to get a better understanding of the impact of streamlined high-speed trains (HSTs) with geometric uncertainty on aerodynamic performance, as well as the identification of the key parameters responsible for this impact. To reveal the critical parameters, this study creates a methodology for evaluating the uncertainty and sensitivity of drag coefficient induced by design parameters
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Linear and energy stability analyses of onset of Darcy-Bénard convection due to combustion Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-11-26 P.G. Siddheshwar, Reena Nandal
Purpose This paper aims to perform a linear and nonlinear analysis of the stability of a chemically reacting Newtonian fluid in a Darcy porous medium. The purpose of selecting both analyses is to investigate the probability of subcritical instability resulting from combustion. Design/methodology/approach The chemical reaction problem in a Darcy porous medium with Arrhenius kinetics is considered. The
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Thermo-hydraulic performance of air heat exchanger using prepared ternary HNF: a CFD analysis Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-11-25 Ranjeet Rai, Vikash Kumar, R.R. Sahoo
Purpose Nowadays fossil fuel prices have increased; therefore, consumption of energy reduction has become a significant issue. Hence, this study aims to explore energy-efficient mechanical devices and their energy management. Design/methodology/approach This study focused on numerical analysis of various factors, including pressure drop, sensitivity, heat transfer and friction factor. This study compared
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Multiple exact solutions in tri-hybrid nanofluid flow: a study of elastic surface effects Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-11-25 Waqar Khan Usafzai, Emad H. Aly, Ioan Pop
Purpose The purpose of this study is to investigate the simultaneous effects of normal wall transpiration, stretching strength parameter, velocity slip and nanoparticles on the flow of a ternary hybrid nanofluid through an elastic surface. The goal is to understand the behavior of the flow field, temperature distribution, skin friction and temperature gradient under these conditions, and to explore
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Structural dynamic responses evaluation of pedestrian bridge under effect of aerodynamic disturbance of high-speed train Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-11-26 Jiawang Zeng, Ming-Zhi Yang, Lei Zhang, Tongtong Lin, Sha Zhong, Yu Tao
Purpose The aerodynamic load caused by high-speed train operation may lead to severe vibration of the pedestrian bridge, thus causing great safety hazards. Therefore, this study aims to investigate the aerodynamic loading characteristics of a pedestrian bridge when a high-speed train passes over the bridge, as well as to evaluate the vibration response of the aerodynamic loads on the bridge structure
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Experimental and numerical study of thermal analysis of Al2O3/C2H6O2 nanofluid with porous medium in corrugated converge-diverge enclosure with magnetohydrodynamic effect Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-11-25 Nehad Abid Allah Hamza, Amal Hussein Oliwie, Nejla Mahjoub Said, Isam Abed, Qusay Rasheed
Purpose This study aims to investigate experimentally and numerically the thermal analysis of a wavy diverging-converging corrugated enclosure, partitioned into two parts under the effect of magnetohydrodynamic (MHD) natural convection. The left part was filled with Al2O3/C2H6O2 nanofluid, while the right part was Al2O3/C2H6O2 saturated by a porous medium, featuring a corrugated cylinder at the center
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Dual solutions of hybrid nanofluid flow past a permeable melting shrinking sheet with higher-order slips, shape factor and viscous dissipation effect Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-11-20 Shahirah Abu Bakar, Ioan Pop, Norihan Md Arifin
Purpose This paper aims to explore dual solutions for the flow of a hybrid nanofluid over a permeable melting stretching/shrinking sheet with nanoparticle shape factor, second-order velocity slip conditions and viscous dissipation. The hybrid nanofluid is formulated by dispersing alumina (Al2O3) and copper (Cu) nanoparticles into water (H2O). Design/methodology/approach The governing partial differential
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Uncertainty analysis of MHD oscillatory flow of ternary nanofluids through a diverging channel: a comparative study of nanofluid composites Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-11-14 B. Jaismitha, J. Sasikumar
Purpose This study aims to investigate the heat and mass transfer characteristics of a temperature-sensitive ternary nanofluid in a porous medium with magnetic field and the Soret–Dufour effect through a tapered asymmetric channel. The ternary nanofluid consists of Boron Nitride Nanotubes (BNNT), silver (Ag) and copper (Cu) nanoparticles, with a focus on understanding the thermal behaviour and performance
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Twisted-tape inserts of rectangular and triangular sections in turbulent flow of CMC/CuO non-Newtonian nanofluid into an oval tube Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-11-12 Soroosh Shojaee, Mohammad Vahabi, Saeed Dinarvand, Amirhossein Hamedi, Arash Mirabdolah Lavasani, Zahra Moinfar
Purpose This paper aims to study numerically the non-Newtonian solution of carboxymethyl cellulose in water along with copper oxide nanoparticles, which flow turbulently through twisted smooth and finned tubes. Design/methodology/approach The twisted-tape inserts of rectangular and triangular sections are investigated under constant wall heat flux and the nanoparticle concentration varies between 0%
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Entropy optimization in a radiative and chemically reactive EMHD flow of a nanofluid coexisting Ohmic dissipation and multiple slips Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-11-07 Mohanaphriya US, Tanmoy Chakraborty
Purpose This research focuses on the controlling irreversibilities in a radiative, chemically reactive electromagnetohydrodynamics (EMHD) flow of a nanofluid toward a stagnation point. Key considerations include the presence of Ohmic dissipation, linear thermal radiation, second-order chemical reaction with the multiple slips. With these factors, this study aims to provide insights for practical applications
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Numerical investigation of two-dimensional fractional Helmholtz equation using Aboodh transform scheme Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-10-30 Muhammad Nadeem, Mohamed Sharaf, Saipunidzam Mahamad
Purpose This paper aims to present a numerical investigation for two-dimensional fractional Helmholtz equation using the Aboodh integral homotopy perturbation transform scheme (AIHPTS). Design/methodology/approach The proposed scheme combines the Aboodh integral transform and the homotopy perturbation scheme (HPS). This strategy is based on an updated form of Taylor’s series that yields a convergent
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Nanofluid effect on dual-flow parabolic trough collector performance accompanies with passive technique using experimental data Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-10-23 Ali Akbar Abbasian Arani, Ali Memarzadeh
Purpose Using passive techniques like twisted tapes and corrugated surface is an efficient method of heat transfer improvement, since the referred manners break the boundary layer and improve the heat exchange. This paper aims to present an improved dual-flow parabolic trough collector (PTC). For this purpose, the effect of an absorber roof, a type of turbulator and a grooved absorber tube in the presence
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A numerical study of double flow focusing micro-jets Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-10-22 Rizwan Zahoor, Saša Bajt, Božidar Šarler
Purpose Double flow-focusing nozzles (DFFNs) form a coaxial flow of primary liquid with micro-crystalline samples, surrounded by secondary liquid and focusing gas. This paper aims to develop an experimentally validated numerical model and assess the performance of micro-jets from a DFFN as a function of various operating parameters for the water–ethanol–helium system, revealing the jet's stability
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Comparative analysis of buoyancy-driven hydromagnetic flow and heat transfer in a partially heated square enclosure using Cu-Fe3O4 and MoS2-Fe3O4 nanofluids Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-10-21 N. Ameer Ahammad
Purpose This study aims to investigate entropy generation through natural convection and examine heat transfer properties within a partially heated and cooled enclosure influenced by an angled magnetic field. The enclosure, subjected to consistent heat production or absorption, contains a porous medium saturated with a hybrid nanofluid blend of Cu-Fe3O4 and MoS2-Fe3O4. Design/methodology/approach The
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Hemodynamic characteristics of pulsatile blood flow through bifurcated stenosed carotid artery Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-10-21 Swapnil Narayan Rajmane, Shaligram Tiwari
Purpose Carotid artery is often associated with plaque deposition because of its shape and associated flow features. The shape of stenosed bifurcation is characterised by bifurcation angle (ß), planarity angle (α) and severity of stenosis (b). In the present work, three-dimensional numerical computations have been performed to analyse the effect of these geometrical parameters of carotid bifurcation
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Experimental and numerical study of characteristic parameters of Taylor bubble in vertical pipe under short-time gas injection Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-10-17 Yufeng Ren, Changqing Bai, Hongyan Zhang
Purpose This study aims to investigate the formation and characteristics of Taylor bubbles resulting from short-time gas injection in liquid-conveying pipelines. Understanding these characteristics is crucial for optimizing pipeline efficiency and enhancing production safety. Design/methodology/approach The authors conducted short-time gas injection experiments in a vertical rectangular pipe, focusing
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Computational multiphase mixture simulations of a two-phase R-744 ejector geometry in transcritical R-744 heat pump applications Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-10-17 Baris Burak Kanbur, Alexander Busch, Ekaterini E. Kriezi, Wiebke Brix Markussen, Martin Ryhl Kærn, Jóhannes Kristófersson, Jens Honore Walther
Purpose Two-phase R-744 ejectors are critical components enabling energy recovery in R-744 heat pump and refrigeration systems, but despite their simple geometry, the flow physics involve complex multiphase mixing phenomena that need to be well-quantified for component and overall system improvement. This study aims to report on multiphase mixture simulations for a specific two-phase R-744 ejector
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Integrating forecasting methods to support finite element analysis and explore heat transfer complexities Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-10-16 Maryam Fatima, Peter S. Kim, Youming Lei, A.M. Siddiqui, Ayesha Sohail
Purpose This paper aims to reduce the cost of experiments required to test the efficiency of materials suitable for artificial tissue ablation by increasing efficiency and accurately forecasting heating properties. Design/methodology/approach A two-step numerical analysis is used to develop and simulate a bioheat model using improved finite element method and deep learning algorithms, systematically
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MHD double diffusive convective squeezing ternary nanofluid flow between parallel plates with activation energy and viscous dissipation Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-10-15 Sivasankaran Sivanandam, Chandrapushpam Thangaraj, M. Bhuvaneswari
Purpose This study aims to present the consequences of activation energy and the chemical reactions on the unsteady MHD squeezing flow of an incompressible ternary hybrid nanofluid (THN) comprising magnetite (FE3O4), multiwalled carbon nano-tubes (MWCNT) and copper (Cu) along with water (H2O) as the base fluid. This investigation is performed within the framework of two moving parallel plates under
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Heat transfer in a non-uniformly heated enclosure filled by NEPCM water nanofluid Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-10-15 Rajesh Vemula, Hakan F. Öztop
Purpose This paper aims to focuses on by investigate the heat transmission and free convective flow of a suspension of nano encapsulated phase change materials (NEPCMs) within an enclosure. Particles of NEPCM have a core-shell structure, with phase change material (PCM) serving as the core. Design/methodology/approach The enclosure consists of a square chamber with an insulated wall on top and bottom
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Plane dilatational and shear waves in a chiral porous thermoelastic medium under strain gradient theory Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-10-11 Aakash Kumar, Suraj Goyal
Purpose This study aims to investigate time-harmonic wave propagation in a chiral porous thermoelastic solid under strain gradient theory (SGT), focusing on identifying and characterizing distinct wave modes within the medium. Design/methodology/approach Using Iesan's gradient theory, which incorporates chiral effects and accommodates second sound phenomena, the authors derive mathematical formulations
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Dual characteristics of mixed convection flow of three-particle aqueous nanofluid upon a shrinking porous plate Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-10-09 Nepal Chandra Roy, Md. Mahmudul Hassan, Saeed Dinarvand
Purpose This study aims to analyze the thermo-hydrodynamic characteristics for the mixed convection boundary layer flow of three-particle aqueous nanofluid on a shrinking porous plate with the influences of thermal radiation and magnetic field. Design/methodology/approach The basic equations have been normalized with the help of similarity transformations. The obtained equations have been solved numerically
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Analysis of efficient discretization technique for nonlinear integral equations of Hammerstein type Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-10-03 Imtiyaz Ahmad Bhat, Lakshmi Narayan Mishra, Vishnu Narayan Mishra, Cemil Tunç
Purpose This study focuses on investigating the numerical solution of second-kind nonlinear Volterra–Fredholm–Hammerstein integral equations (NVFHIEs) by discretization technique. The purpose of this paper is to develop an efficient and accurate method for solving NVFHIEs, which are crucial for modeling systems with memory and cumulative effects, integrating past and present influences with nonlinear