Buoyancy Induced Convection From Biheaters in a Cavity: A Numerical Study

Giri, Asis; Patel, Swastika

doi:10.1115/1.4040140

Cited by 2 publications

(1 citation statement)

References 19 publications

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“…There are many research works available in the literature related to grooved channels and isolated heated walls of the defined geometry, to study the combined convective flow scenarios 8,21,[33][34][35][36][37][38][39][40] There is no previous existing numerically simulated research work that has been performed on the transient free convective flows problem in a modified geometry by using a fourth-order compact finite-difference scheme. This is also imperative to comprehend the 3-D natural and forced convective flow scenarios in the defined considered geometries.…”

Section: Analyzed Transitional Flow In a Periodically T-shaped Groove...mentioning

confidence: 99%

Transient natural convective heat transfer and fluid flow in an undulated cavity: Effects of localized heat sources

Choudhary

Ray

2022

Heat Trans

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The purpose of this research work is to investigate two‐dimensional transient natural convective heat transfer and fluid flows in an undulated cavity by placing solid objects with isolated heated surfaces on the bottom wall. We discretize the coupled nonlinear transport equations using a higher‐order compact finite‐difference scheme. First, we test our scheme using existing experimental and numerical data. Then, we analyze the transient and steady‐state natural convective flow phenomena for distributed heat sources on corrugations on the lower wall for a range of the Rayleigh number MathClass-open(R a = 1 0 3 − 1 0 6 MathClass-close) $(Ra=1{0}^{3}-1{0}^{6})$ and Prandtl number MathClass-open(P r = 0.71 MathClass-close) $(Pr=0.71)$. These simulated outcomes are presented in the form of central‐line velocity MathClass-open(u , v MathClass-close) $(u,v)$, local MathClass-openfalse(N u h * , N u v * MathClass-closefalse) $(N{u}_{h}^{* },N{u}_{v}^{* })$ and averaged MathClass-openfalse(N u h * true¯ , N u v * true¯ MathClass-closefalse) $(\bar{N{u}_{h}^{* }},\bar{N{u}_{v}^{* }})$ Nusselt numbers, streamlines MathClass-open( ψ MathClass-close) $(\psi )$, dispersion of isotherms MathClass-open( T MathClass-close) $(T)$, and so forth. It is found that the transient fluid flow behavior is more magnificent than the steady‐state solutions and shows the dominant behavior of the prominent primary cells over secondary cells, where it influences the heat transfer rates inside the entire enclosure. In steady states, at high Rayleigh numbers; convection dominates, formation of thermal boundary layers, compression of isotherms, and stratification of isotherms are significantly observed. Our results show many interesting flow phenomena that have not been analyzed previously.

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