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Numerical Heat Transfer, Part A: Applications
An International Journal of Computation and Methodology
Volume 28, 1995 - Issue 4
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Original Articles

CONJUGATE HEAT TRANSFER AND BUOYANCY-DRIVEN SECONDARY FLOW IN THE COOLING CHANNELS WITHIN A VERTICAL SLAB

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Pages 443-460 | Received 06 Dec 1994, Accepted 10 May 1995, Published online: 27 Feb 2007
 

Abstract

The present study is concerned with buoyancy-induced secondary flow and heat transfer characteristics in a series of circular cooling channels within a vertical slab. The fully developed flows, in which the transverse thermal energy diffusion plays a dominant role in the overall heat transfer behavior, are analyzed numerically. Thermal energy transmits transversely from the hotter end surface to the colder end surface across the slab through a domain containing a solid region and a fluid region occupied by the cooling channels. The stream function-vorticity formulation and the finite volume method coupled with a body-fitted coordinate transformation scheme are employed to analyze this conjugate heat transfer problem. Results show that when the Grashof number is higher than approximately 10Citation 3 , the strength of the secondary flow becomes appreciable and results in a significant increase in overall heat transfer rate. In this study a maximum 120% increase in heat transfer rate, but only 12% increase in friction factor, is found within the parameter ranges considered.

Additional information

Notes on contributors

Chin-Hsiang Cheng

The financial support of this work from the National Science Council, Republic of China, under grant NSC 80-0401-E-036-03 is gratefully acknowledged.

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