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Showing papers in "Numerical Heat Transfer Part A-applications in 2020"


Journal ArticleDOI
TL;DR: In this paper, Minichannel heat sinks are one among type of cooling mechanisms in order to evade performance decline in electronic devices, which is a challenge to engineers to provide a proficient cooling mechanism.
Abstract: Growth in electronic devices comes with a challenge to engineers to provide proficient cooling mechanism in order to evade performance decline. Minichannel heat sinks are one among type of cooling ...

40 citations


Journal ArticleDOI
TL;DR: In this article, six models based on different fin configuration of the energy storage tank with phase change material were established and the fin structure of model 3 was designed by topology optimization method.
Abstract: Six models based on different fin configuration of the energy storage tank with phase change material were established. The fin structure of model 3 is designed by topology optimization method. The...

27 citations


Journal ArticleDOI
TL;DR: The high-performance and functional diversification cooling devices are obtained by the proposed optimization method in this research, and several numerical examples are provided to study the effects of the weighting coefficient changes on the optimal results.
Abstract: This article presents a density-based topology optimization (TO) method for a coupled thermal-fluid problem, in which the Navier-Stokes and heat transport equations are coupled. The two-dimensional...

24 citations


Journal ArticleDOI
TL;DR: In this article, the melting process of aluminum foam/paraffin composite with low porosity was investigated using experimental and numerical methods, and three composites with porosities of 67, 75, and 75% were constructed.
Abstract: The present article investigates the melting process of aluminum foam/paraffin composite with low porosity by using experimental and numerical methods. Three composites with porosities 67%, 75%, an...

18 citations


Journal ArticleDOI
TL;DR: In this paper, the convective heat transfer process for fluid flows through nanochannels becomes imperative due to the wide application of the micro/nanochannel cooling technology, and the understanding of the convection heat transfer processes for fluid flow through Nanochannel becomes imperative.
Abstract: The understanding of the convective heat transfer process for fluid flows through nanochannels becomes imperative due to the wide application of the micro/nanochannel cooling technology. In this wo...

18 citations


Journal ArticleDOI
TL;DR: In this paper, an assessment of physics-based and data-driven reduced-order models for convective heat transfer in a rectangular cavity is presented for the study of convective energy transfer.
Abstract: An assessment of physics-based and data-driven reduced-order models (ROMs) is presented for the study of convective heat transfer in a rectangular cavity. Despite the simple geometrical con...

16 citations


Journal ArticleDOI
TL;DR: In this article, the authors investigated the conjugate natural convection heat transfer inside a differentially heated square cavity having a heat conducting and sinusoidal corrugated solid partition.
Abstract: Conjugate natural convection heat transfer inside a differentially heated square cavity having a heat conducting and sinusoidal corrugated solid partition has been investigated numerically in the p...

16 citations


Journal ArticleDOI
TL;DR: In this paper, the bubble dynamics and their effects on flow boiling heat transfer in a horizontal channel were investigated under constant wall temperature and constant wall heat flux conditions, and it was found that bubble dynamics can be used to study the effect of flow boiling in horizontal channels.
Abstract: The bubble dynamics and their effects on flow boiling heat transfer in a horizontal channel are investigated under constant wall temperature and constant wall heat flux conditions. It is found that...

13 citations


Journal ArticleDOI
TL;DR: In this article, the lattice Boltzmann method was used to simulate the double diffusive natural convection of nanofluids (Al2O3 -H2O) in a porous cavity under the action of a magnetic field.
Abstract: The lattice Boltzmann method (LBM) is used to simulate the double diffusive natural convection of nanofluids (Al2O3 – H2O) in a porous cavity under the action of a magnetic field. The effects on te...

13 citations


Journal ArticleDOI
TL;DR: In this paper, the effects of three parameters of a mini-channel cold plate on the cooling performance of a U-shaped mini channel structure, including channel length, channel width and channel width, were investigated.
Abstract: In order to investigate the effects of three parameters of a mini-channel cold plate on the cooling performance of a U-shaped mini-channel structure, the effects of the channel length (L), width (W...

12 citations


Journal ArticleDOI
TL;DR: In this paper, the behavior and mechanisms of heat transfer deterioration (HTD) were explored in upward vertical tubes with a focus on the flow and thermal performances of supercritical n-decane.
Abstract: To explore the behavior and mechanisms of heat transfer deterioration (HTD), the flow and thermal performances of supercritical n-decane in upward vertical tubes are investigated with emphasis on t...

Journal ArticleDOI
TL;DR: In this paper, the authors proposed to enhance the heat transfer rate significantly by air jet impingement, which is the most essential goal of the modern era, and the aim of this article is to enhance heat transfer ratio significantly.
Abstract: To achieve higher heat transfer rate for cooling by air jet impingement is the most essential goal of the modern era. The aim of this article is to enhance the heat transfer rate significantly by u...

Journal ArticleDOI
TL;DR: In this article, a quantitative analysis of total radiation heat loss from a cavity receiver is numerically studied, where Gaussian eliminations method is used to solve the set of radiosity equations to estimate the heat loss.
Abstract: A quantitative analysis of total radiation heat loss from a cavity receiver is numerically studied. Gaussian eliminations method is used to solve the set of radiosity equations to estimate ...

Journal ArticleDOI
TL;DR: In this paper, a test facility has been set up to observe direct water-air interaction with and without a cellulose cooling pad, and volumetric heat and mass transfer coefficients have been intro...
Abstract: In the present work, a test facility has been set up to observe direct water–air interaction with and without a cellulose cooling pad. Volumetric heat and mass transfer coefficients have been intro...

Journal ArticleDOI
TL;DR: In this paper, a case that simulated the air flow was presented, where the multiple-relaxation-time Lattice Boltzmann method (MRT-LBM) was used.
Abstract: As an effective CFD approach, Multiple-Relaxation-Time Lattice Boltzmann Method (MRT-LBM) has gradually gained its popularity in the past 20 years. In this article, a case that simulated the airflo...

Journal ArticleDOI
TL;DR: In this paper, the oscillatory flow and the heat transfer in two-dimensional pulsating heat pipes (PHPs) with multi-turns were simulated using OpenFOAM, and the volume of fluid method was used for the phase c...
Abstract: The oscillatory flow and the heat transfer in two-dimensional pulsating heat pipes (PHPs) with multi-turns were simulated using OpenFOAM. The volume of fluid method was used for the phase c...

Journal ArticleDOI
TL;DR: In this paper, a comprehensive numerical investigation of the natural convection in a hydro-dynamically as well as thermally anisotropic porous enclosure with insulated side walls is presented.
Abstract: In this article, a comprehensive numerical investigation of the natural convection in a hydro-dynamically as well as thermally anisotropic porous enclosure with insulated side walls is presented. T...

Journal ArticleDOI
TL;DR: In this paper, the effects of buoyancy force and thermal boundary condition on the mixed convection heat transfer performance of air in a horizontal microchannel were explored. And three different heat transfer conditions were investigated.
Abstract: This article aims to explore the effects of buoyancy force and thermal boundary condition on the mixed convection heat transfer performance of air in a horizontal microchannel. Three different heat...

Journal ArticleDOI
TL;DR: In this paper, the authors numerically investigated film cooling performance and particle trajectories in AGTB (two rows of cylindrical holes equipped on suction side (SS) and pressure side (PS) of the lea...
Abstract: This study numerically investigates film-cooling performance and particle trajectories in AGTB (two rows of cylindrical holes equipped on suction side (SS) and pressure side (PS) of the lea...

Journal ArticleDOI
TL;DR: In this paper, the temperature of biological tissues is estimated during hyperthermia therapy, while accounting for uncertainties in the bioheat transfer problem and in the available meas..., and the temperature is assumed to be stable.
Abstract: In this article, the temperature of biological tissues is estimated during hyperthermia therapy, while accounting for uncertainties in the bioheat transfer problem and in the available meas...

Journal ArticleDOI
TL;DR: In this article, the effects of porous fins on mixed convection inside lid-driven square enclosures were reported, where the porous medium with varying permeability was used instead of the solid one.
Abstract: The effects of porous fins on mixed convection inside lid-driven square enclosures were reported in the present work. The porous medium with varying permeability, instead of the solid one, could wi...

Journal ArticleDOI
TL;DR: In this paper, a detailed 2D computational fluid dynamics model simulating two-phase flow and heat transfer in a TPLTS was presented, which was built to represent the two phase flow in a two phase loop thermosyphon.
Abstract: A detailed 2-D computational fluid dynamics (CFD) model simulating two-phase flow and heat transfer in a two-phase loop thermosyphon (TPLTS) is presented. The CFD simulation was built to represent ...

Journal ArticleDOI
TL;DR: The cladding layer formed by laser cladding is formed by solidification of the molten pool and the quality of the cladding layers is directly determined by the evolution of the liquid pool.
Abstract: The cladding layer formed by laser cladding is formed by solidification of the molten pool The quality of the cladding layer is directly determined by the evolution of the molten pool The numeric

Journal ArticleDOI
TL;DR: In this paper, the effects of an inclined elliptical cylinder on mixed convection in a square enclosure at three different Reynolds numbers, Re = 100, 500, and 1,000, and a fixed Grashof numbe
Abstract: This study examined the effects of an inclined elliptical cylinder on mixed convection in a square enclosure at three different Reynolds numbers, Re = 100, 500, and 1,000, and a fixed Grashof numbe

Journal ArticleDOI
TL;DR: In this paper, the authors address multiple droplets impact on a flowing liquid film numerically based on a three-dimensional model developed previously, and address interfacial behavior and h...
Abstract: This study addresses multiple droplets impact on a flowing liquid film numerically based on a three-dimensional model developed previously. Major contents include interfacial behavior and h...

Journal ArticleDOI
TL;DR: In this article, the authors examined the heat transfer of four wedge-shifts on the trailing edge of a turbine blade of an aircraft engine and found that they play a very important role in cooling the turbine blade.
Abstract: The heat transfer on the trailing edge plays a very important role in cooling the turbine blade of an aircraft engine. The goal of the present study is to examine the heat transfer of four wedge-sh...

Journal ArticleDOI
TL;DR: In this paper, a fixed-grid interface tracking method using finite volume method to simulate multidimensional rapid solidification (RS) of under-cooled pure metal was presented.
Abstract: In this study, we present a novel fixed-grid interface-tracking method using finite volume method to simulate multidimensional rapid solidification (RS) of under-cooled pure metal. The discretized ...

Journal ArticleDOI
TL;DR: In this paper, the authors investigated the wetting states and wetting transition of droplets on microstructured surfaces using the multiphase lattice Boltzmann method using the Cassie-Baxter (Cassie) and W...
Abstract: In this study, the wetting states and wetting transition of droplets on the microstructured surfaces are investigated using the multiphase lattice Boltzmann method. The Cassie-Baxter (Cassie) and W...

Journal ArticleDOI
TL;DR: In view of the heat transfer deterioration of supercritical CO2 under the condition of low mass flow rate and high heat flux, the influence of Body-Centred Cubic (BCC) lattice, Kagome lattice and P... as discussed by the authors.
Abstract: In view of the heat transfer deterioration of supercritical CO2 under the condition of low mass flow rate and high heat flux, the influence of Body-Centred Cubic (BCC) lattice, Kagome lattice and P...

Journal ArticleDOI
TL;DR: The development of computationally efficient modeling techniques for thermally driven buoyant flows remains an ongoing challenge for the computational fluid dynamics (CFD) community due to the complex complexity of the complex dynamics as discussed by the authors.
Abstract: Development of computationally efficient modeling techniques for thermally driven buoyant flows remains an ongoing challenge for the computational fluid dynamics (CFD) community due to the complex ...