Computation of enhanced turbulent heat transfer in a channel with periodic ribs
International Journal of Numerical Methods for Heat & Fluid Flow
ISSN: 0961-5539
Article publication date: 1 February 2000
Abstract
This study evaluates low Reynolds number models of turbulence for numerical computations on the heat transfer and fluid flow behavior in a rectangular channel with streamwise‐periodic ribs mounted on one of the principal walls. The models include k − ε models of Launder and Sharma (1974), Chien (1982), k − ε model of Lin and Hwang (1998), Wilcox’s k−ω model (Wilcox, 1994) and Durbin’s model k − ε −v2 (Durbin, 1995). The numerical results show that all these models can predict the flowfield reasonably well, and the inclusion of the Yap term (Yap, 1987) in the ε – equation (or ε – equation) can further improve the prediction in these k − ε models, k − ε model and k − ε − v2 model. However, these models behave differently in heat transfer computations. The k − ω model leads to too low a level of heat transfer and turbulence. Among these k − ε models and the k − ε model, Lin’s model with the Yap term predicts the heat transfer level best. Durbin’s model with extra v2, f equations and the Yap term exhibits further improvement.
Keywords
Citation
Tsai, W.B., Lin, W.W. and Chieng, C.C. (2000), "Computation of enhanced turbulent heat transfer in a channel with periodic ribs", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 10 No. 1, pp. 47-66. https://doi.org/10.1108/09615530010306902
Publisher
:MCB UP Ltd
Copyright © 2000, MCB UP Limited