Natural convection and heat transfer in a valley shaped cavity filled with initially stratified water

Bhowmick, Sidhartha; Xu, Feng; Zhang, Xun; Saha, Suvash C.

doi:10.1016/j.ijthermalsci.2018.02.019

Cited by 23 publications

(10 citation statements)

References 41 publications

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“…They found that heat transfer near open walls is more than elsewhere. Bhowmick et al [39] used a triangular cavity and found that the heat transfer rate improved with growing Ra. Grosan et al [40] examined vibrating wall using the finite differential method.…”

Section: Air and Watermentioning

confidence: 99%

A Review on the Control Parameters of Natural Convection in Different Shaped Cavities with and without Nanofluid

et al. 2020

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Natural convection in cavities is an interesting subject for many researchers. Especially, in recent years, the number of articles written in this regard has grown enormously. This work provides a review of recent natural convection studies. At first, experimental studies were reviewed and, then, numerical studies were examined. Then, the articles were classified based on effective parameters. In each section, numerical studies were examined the parameters added to the cavity such as magnetic forces, fin, porous media and cavity angles. Moreover, studies on non-rectangular cavities were investigated. Free convection in enclosures depends more on the fluid velocity relative to the forced convection, leading to the opposite effect of some parameters that should essentially enhance rate of heat transfer. Nanoparticle addition, magnetic fields, fins, and porous media may increase forced convection. However, they can reduce free convection due to the reduction in fluid velocity. Thus, these parameters need more precision and sometimes need the optimization of effective parameters.

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Section: Air and Watermentioning

confidence: 99%

A Review on the Control Parameters of Natural Convection in Different Shaped Cavities with and without Nanofluid

et al. 2020

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“…The simplicity of ignoring density variations except in buoyancy term and treating the flow field as incompressible while its existence is due to density variations makes the classic Boussinesq approximation popular. [2][3][4][5][6][7][8][9][10][11][12][13][14][15] Another advantage of the Boussinesq approximation that justifies its application for a broad range of the natural convection simulations is its simple implementation and accuracy of performance for problems having small temperature differences. The Boussinesq approximation, accompanied by a linear relation between density and temperature via a volumetric thermal expansion coefficient, is the basis of many numerical simulations of natural convection benchmark problems such as rectangular, 2-7 triangular [8][9][10][11] and annular [12][13][14] enclosed geometries.…”

Section: Introductionmentioning

confidence: 99%

Natural convection and entropy generation in square and skew cavities due to large temperature differences: A Gay–Lussac‐type vorticity stream‐function approach

Mayeli

Sheard

2021

Numerical Methods in Fluids

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In this study, a benchmark natural convection problem is studied under a Gay-Lussac-type approximation incorporating centrifugal effects in the context of a new vorticity-stream-function approach. This approximation differs from the classic Boussinesq approximation in that density variations are considered in the advection term as well as the gravity term in the momentum equations.Such a treatment invokes Froude number as a non-Boussinesq parameter deviating results from the classic Boussinesq approximation. It is also shown how 2396

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“…Numerical attempts at determining convection flow within a T-shaped cavity were made by Esfe et al [9]. Bohowmick et al [10] examined natural convection in a valley-shaped Energies 2021, 14, 6952 2 of 17 cavity occupied by stratified water. Teixeira et al [11] investigated the temperature field behavior of a square plate with T-/H-shaped cavities.…”

Section: Introductionmentioning

confidence: 99%

Natural Convection over Two Superellipse Shapes with a Porous Cavity Populated by Nanofluid

Alsedais

2021

Energies

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The influences of superellipse shapes on natural convection in a horizontally subdivided non-Darcy porous cavity populated by Cu-water nanofluid are inspected in this paper. The impacts of the inner geometries (n = 0.5,1,1.5,4) Rayleigh number (103 ≤ Ra ≤ 106), Darcy number (10−5 ≤ Da ≤ 10−2), porosity (0.2 ≤ ϵ ≤ 0.8), and solid volume fraction (0.01 ≤ ∅ ≤ 0.05) on nanofluid heat transport and streamlines were examined. The hot superellipse shapes were placed in the cavity’s bottom and top, while the adiabatic boundaries on the flat walls of the cavity were considered. The governing equations were numerically solved using the finite volume method (FVM). It was found that the movement of the nanofluid upsurged as Ra boosted. The temperature distributions in the cavity’s core had an inverse relationship with increasing Rayleigh number. An extra porous resistance at lower Darcy numbers limited the nanofluid’s movement within the porous layers. The mean Nusselt number decreased as the porous resistance increased (Da ≤ 10−4). The flow and temperature were strongly affected as the shape of the inner superellipse grew larger.

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Natural convection and heat transfer in a valley shaped cavity filled with initially stratified water

Cited by 23 publications

References 41 publications

A Review on the Control Parameters of Natural Convection in Different Shaped Cavities with and without Nanofluid

A Review on the Control Parameters of Natural Convection in Different Shaped Cavities with and without Nanofluid

Natural convection and entropy generation in square and skew cavities due to large temperature differences: A Gay–Lussac‐type vorticity stream‐function approach

Natural Convection over Two Superellipse Shapes with a Porous Cavity Populated by Nanofluid

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