CALCULATION OF TRANSIENT TURBULENT HEAT TRANSFER IN A RECTANGULAR CHANNEL: TWO-LAYER MODEL
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This paper describes a calculation procedure for the transient turbulent heat transfer in a rectangular channel. Two different cases of boundary conditions were considered, namely, the channel subjected to a step change in the wall temperature (case I) and the channel subjected to a step change in the wall heat flux (case II). The turbulent flow field was modeled using the two-layer model. The governing equation was solved by a fully implicit finite-difference technique. The variation of the dimensionless wall heat flux with distance and time was evaluated for case I, while the variation of the dimensionless wall temperature was studied for case II. Both the time required to reach steady-state conditions and the thermal entry lengths decreased as the Peclet number increased. The results are intended to be used in the form of design charts for determining the transients in heat exchanging devices. © 1988 Taylor 8 Francis Group, LLC.
author list (cited authors)
Somasundaram, S., Anand, N. K., & Husain, S. R.