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Numerical Heat Transfer, Part A: Applications
An International Journal of Computation and Methodology
Volume 43, 2003 - Issue 3
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Original Articles

THERMAL EQUILIBRIUM IN TRANSIENT CONJUGATED FORCED-CONVECTION CHANNEL FLOW

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Pages 327-339 | Published online: 30 Nov 2010
 

Abstract

The validity of the local thermal equilibrium assumption in transient conjugated forced-convection channel flow is investigated numerically. Axial conduction in both fluid and solid domains is included. It is found that five dimensionless parameters control the local thermal equilibrium assumption. These parameters are the thermal diffusivity ratio f R , the Biot number Bi, the dimensionless channel length \xi_{\max} , the Peclet number Pe, and the solid-to-fluid total thermal capacity ratio C R . The qualitative and quantitative aspects of the effects of these five parameters on the channel thermalization time are investigated.

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