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Numerical Heat Transfer, Part A: Applications
An International Journal of Computation and Methodology
Volume 77, 2020 - Issue 4
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Original Articles

Numerical analysis on natural convection in various enclosures

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Pages 391-408 | Received 01 Oct 2019, Accepted 27 Nov 2019, Published online: 18 Dec 2019
 

Abstract

A numerical natural convection study has been carried out that studied various configurations for several enclosures. Conservation equations were solved using the finite volume method; transforming them into vorticity-stream functions. Several configurations are studied over a range of Rayleigh numbers that varied from 103 to 106; for walls that are heated, cooled or insulated. Results are presented using temperature and flow field plots; additionally local Nusselt numbers (Nu) are also presented for all Cases. Results demonstrate that the heat transfer increases as a function of the Rayleigh number; for low Rayleigh numbers (Ra), conduction dominates the heat transfer; as Ra increases, the effect of convection increases. Finally it was found that the presence of an inclined wall will suppress the convection process.

Additional information

Funding

This work is supported by the National Science Foundation of Zhejiang Province (LY19E060004).

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