Conjugate local thermal non-equilibrium heat transfer in a cavity filled with a porous medium: Analysis of the element location
TL;DR: In this paper, the authors considered the local thermal non-equilibrium effects and the effect of the heat transfer bifurcation in the interface of the solid walls and the porous medium in a cavity filled with a porous medium and showed that the location of active walls can significantly affect the streamlines and the fluid isotherm contours in the porous space and the isotherms in the solid wall.
About: This article is published in International Journal of Heat and Mass Transfer.The article was published on 2019-08-01 and is currently open access. It has received 34 citations till now. The article focuses on the topics: Heat transfer & Porous medium.
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TL;DR: In this article, the influence of several variables such as heat distribution methods, thermal and concentration boundary conditions, governing parameters, magnetic field types, numerical schemes, thermophysical correlation types, nanofluid types, slip conditions, Brownian motion, and thermophoresis on the magnetohydrodynamic (MHD) natural convection behaviors of nanofluid in square cavities has been reviewed.
Abstract: The emergence of nanofluids as high-performance thermal transport media has drawn great research attention in the field of heat transfer. Owning to the huge importance of natural convection applications in environmental, agricultural, manufacturing, electronics, aviation, power plants, and industrial processes, heat transfer and flow characteristics of these special fluids in various cavities have been extensively researched. This review paper has paid serious attention to the benefits of controlling the natural convection heat transfer and flow performance of nanofluids in square cavities using magnetic field sources in addition to the aspect ratio, porous media, cavity and magnetic field inclination, hybrid nanofluids, etc. The influence of several variables such as heat distribution methods, thermal and concentration boundary conditions, governing parameters, magnetic field types, numerical schemes, thermophysical correlation types, nanofluid types, slip conditions, Brownian motion, and thermophoresis on the magnetohydrodynamic (MHD) natural convection behaviours of nanofluids in square cavities has been reviewed. The paper focused on the application of numerical and experimental methods to hydromagnetic behaviours of nanofluids in square-shaped enclosures. The concept of bioconvection, bio-nanofluid (green nanofluid), ionic nanofluid, and hybrid nanofluid has also been reviewed in relation to natural convection for the first time. Special cases of MHD natural convection in cavities involving micropolar and hybrid nanofluids are also presented herein. Convective heat transfer in square cavities has been demonstrated to be altered due to the presence of magnetic fields.
104 citations
TL;DR: In this paper, a shape-stabilized phase change material (PCM) composite for enhanced thermal energy storage with nano-encapsulated NEPCM embedded in copper metal foam is presented.
73 citations
TL;DR: In this article, porous domain modeling in the presence of radiation and Lorentz forces has been scrutinized and hybrid nanomaterial has been utilized to get better performance, the final equations with help of non-Darcy model were solved via CVFEM.
Abstract: In current article, porous domain modeling in the presence of radiation and Lorentz forces has been scrutinized. To get better performance, hybrid nanomaterial has been utilized. Final equations with help of non-Darcy model were solved via CVFEM. Outputs reveal that as permeability enhances, thinner boundary layer can be produced, and in existence of magnetic field, permeability has slight effect on Nuave. Lorentz forces keep a reverse link with Nuave and with rise of Da, it improves. Higher gradient in temperature can be achieved with rise of buoyancy forces.
60 citations
TL;DR: In this paper, the phase change flow and heat transfer of phase change materials (PCMs) embedded in a metal-foams heatsink under pulse heating conditions was addressed. But, the authors did not consider the effect of temperature on the heat flux.
45 citations
TL;DR: In this paper, the phase change flow inside a Li-ion battery enclosure with a copper metal foam embedded in paraffin wax phase change material (PCM) was studied numerically.
35 citations
References
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Book•
01 Jan 1992TL;DR: In this paper, an introduction to convection in porous media assumes the reader is familiar with basic fluid mechanics and heat transfer, going on to cover insulation of buildings, energy storage and recovery, geothermal reservoirs, nuclear waste disposal, chemical reactor engineering and the storage of heat-generating materials like grain and coal.
Abstract: This introduction to convection in porous media assumes the reader is familiar with basic fluid mechanics and heat transfer, going on to cover insulation of buildings, energy storage and recovery, geothermal reservoirs, nuclear waste disposal, chemical reactor engineering and the storage of heat-generating materials like grain and coal. Geophysical applications range from the flow of groundwater around hot intrusions to the stability of snow against avalanches. The book is intended to be used as a reference, a tutorial work or a textbook for graduates.
5,570 citations
TL;DR: In this article, the effects of a solid boundary and the inertial forces on flow and heat transfer in porous media were analyzed, and a new concept of the momentum boundary layer central to the numerical routine was presented.
1,427 citations
"Conjugate local thermal non-equilib..." refers background in this paper
...With these assumptions, the continuity, momentum, and energy equations for the steady, two-dimensional flow in an isotropic and homogeneous porous medium can be written as [35-38]:...
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Book•
15 Feb 2009
TL;DR: In this article, the Finite Element Method for Continuum Mechanics has been used for solving nonlinear problems in the field of metamodel physics, including contact problems and time dependent problems.
Abstract: Nonlinear Phenomena.- Basic Equations of Continuum Mechanics.- Spatial Discretization Techniques.- Solution Methods for Time Independent Problems.- Solution Methods for Time Dependent Problems.- Stability Problems.- Adaptive Methods.- Special Structural Elements.- Special Finite Elements for Continua.- Contact Problems.- Automation of the Finite Element Method by J. Korelc.
1,003 citations
TL;DR: In this paper, a new parallel distributed memory multifrontal approach is described to handle numerical pivoting efficiently, a parallel asynchronous algorithm with dynamic scheduling of the computing tasks has been developed.
940 citations
TL;DR: In this paper, boundary conditions for constant wall heat flux in the absence of local thermal equilibrium conditions are analyzed and the effects of variable porosity and thermal dispersion are also analyzed.
295 citations