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Thermal convection and radiation in a rotating cabinet with time-dependent heat-generated solid element and heat-conducting solid walls

Stepan Mikhailenko (Laboratory on Convective Heat and Mass Transfer, National Research Tomsk State University, Tomsk, Russian Federation)
Mohammad Ghalambaz (Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam)
Mikhail A. Sheremet (Laboratory on Convective Heat and Mass Transfer, National Research Tomsk State University, Tomsk, Russian Federation)

International Journal of Numerical Methods for Heat & Fluid Flow

ISSN: 0961-5539

Article publication date: 24 February 2021

Issue publication date: 24 November 2021

155

Abstract

Purpose

This paper aims to study numerically the simulation of convective–radiative heat transfer under an effect of variable thermally generating source in a rotating square chamber. The performed analysis deals with a development of passive cooling system for the electronic devices.

Design/methodology/approach

The domain of interest of size H rotating at a fixed angular velocity has heat-conducting solid walls with a constant cooling temperature for the outer boundaries of the vertical walls and with thermal insulation for the outer borders of the horizontal walls. The chamber has a heater on the bottom wall with a time-dependent volumetric heat generation. The internal surfaces of the walls and the energy element are both grey diffusive emitters and reflectors. The fluid is transparent to radiation. Computational model has been written using non-dimensional parameters and worked out by the finite difference technique. The effect of the angular velocity, volumetric heat generation frequency and surface emissivity has been studied and described in detail.

Findings

The results show that growth of the surface emissivity leads to a diminution of the mean heater temperature, while a weak rotation can improve the energy transport for low volumetric thermal generation frequency.

Originality/value

An efficient computational approach has been used to work out this problem. The originality of this work is to analyze complex (conductive–convective–radiative) energy transport in a rotating system with a local element of time-dependent volumetric heat generation. To the best of the authors’ knowledge, an interaction of major heat transfer mechanisms in a rotating system with a heat-generating element is scrutinized for the first time. The results would benefit scientists and engineers to become familiar with the analysis of complex heat transfer in rotating enclosures with internal heat-generating units, and the way to predict the heat transfer rate in advanced technical systems, in industrial sectors including transportation, power generation, chemical sectors and electronics.

Keywords

Acknowledgements

This work was supported by the Russian Science Foundation (Project No. 17–79-20141). The authors also wish to thank the very competent reviewers for the valuable comments and suggestions.

Citation

Mikhailenko, S., Ghalambaz, M. and Sheremet, M.A. (2021), "Thermal convection and radiation in a rotating cabinet with time-dependent heat-generated solid element and heat-conducting solid walls", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 31 No. 12, pp. 3527-3546. https://doi.org/10.1108/HFF-10-2020-0614

Publisher

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Emerald Publishing Limited

Copyright © 2021, Emerald Publishing Limited

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