ON THE PERIODIC CONDITIONS TO SIMULATE MIXED CONVECTION HEAT TRANSFER IN HORIZONTAL CHANNELS

E. Bilgen Mechanical Engineering Department, Ecole Potytechnique University of Montreal, P. O. Box 6079 St. A, Montreal Quebec, H3C 3A7, Canada

X. Wang Mechanical Engineering Department, Ecole Potytechnique University of Montreal, P. O. Box 6079 St. A, Montreal Quebec, H3C 3A7, Canada

P. Vasseur Mechanical Engineering Department, Ecole Potytechnique University of Montreal, P. O. Box 6079 St. A, Montreal Quebec, H3C 3A7, Canada

F. Meng Mechanical Engineering Department, Ecole Potytechnique University of Montreal, P. O. Box 6079 St. A, Montreal Quebec, H3C 3A7, Canada

L. Robillard Mechanical Engineering Department, Ecole Potytechnique University of Montreal, P. O. Box 6079 St. A, Montreal Quebec, H3C 3A7, Canada

Abstract

Mixed convection heat transfer in open-ended channels with discrete heating from below is numerically studied when the convection cells remain attached to the heating elements. Two approaches an used: in method A, the computation domain covers the whole channel, while in method B, periodic conditions are imposed at the entrance and exit of a computation domain that is one wavelength long, Nu is calculated as functions of Ra (5 × 10³ ≤ Ra ≤ 20 × 10³) and of Pe (0.1 ≤ Pe ≤ 2.5). The results from two approaches show that method B can adequately be used to calculate heat transfer.

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ON THE PERIODIC CONDITIONS TO SIMULATE MIXED CONVECTION HEAT TRANSFER IN HORIZONTAL CHANNELS

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ON THE PERIODIC CONDITIONS TO SIMULATE MIXED CONVECTION HEAT TRANSFER IN HORIZONTAL CHANNELS

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