The present analysis is concerned with the criteria for the onset of flow reversal of the fully developed mixed convection in a\r\nvertical channel under the effect of the chemical reaction. The governing equations and the critical values of the buoyancy force are\r\nsolved and calculated numerically via MAPLE. Parameter zones for the occurrence of reversed flow are presented. The exothermic\r\nchemical reaction is found to enhance the flow reversal and made flow reversal possible for symmetrical walls temperature.
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