Natural Convection in Binary Gases Due to Horizontal Thermal and Solutal Gradients

[+] Author and Article Information
J. A. Weaver, R. Viskanta

Heat Transfer Laboratory, School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907

J. Heat Transfer 113(1), 141-147 (Feb 01, 1991) (7 pages) doi:10.1115/1.2910518 History: Received February 02, 1990; Revised July 01, 1990; Online May 23, 2008


The influence of augmenting and opposing thermal and solutal buoyancy forces on natural convection of binary gases due to horizontal temperature and concentration gradients is examined through comparison of smoke flow visualization and measured temperature and concentration distributions with numerical predictions. The observed flow at the cold wall was unsteady for opposing body forces. The same basic flow structure was observed, but the unsteady flow intensifies as the opposing solutal buoyancy force increases as compared to the thermal buoyancy force. Comparison of predicted and measured temperatures and concentrations is fair overall, but the steady-state analytical model fails to predict the unsteady flow and heat and mass transport for opposing body forces.

Copyright © 1991 by The American Society of Mechanical Engineers
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