Published 4 issues per year
ISSN Print: 1065-3090
ISSN Online: 1940-4336
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EXPERIMENTAL AND NUMERICAL FLOW VISUALIZATIONS OF MIXED CONVECTION WITH FLOW REVERSAL IN A HORIZONTAL ISOTHERMAL CHANNEL
ABSTRACT
Experimental and numerical flow visualizations were performed to study the laminar mixed convection with flow reversal in a thermally developing region of a horizontal square channel. The flow reversal near the upper wall in the entrance region of the channel was visualized experimentally by means of a dye-injection method. Moreover, the three-dimensional unsteady Navier-Stokes equations were solved by using the QUICK and SIMPLE methods. We considered the effect of the physical properties of the fluid with temperatures in the numerical analysis. Experimental flow visualization and three-dimensional behavior of streamlines by numerical analysis on the flow reversal were in agreement. The effects of wall temperature and the Reynolds number on the size of the separation region were also examined, and the three-dimensional mechanism of flow reversal was discussed.
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Elatar Ahmed, Siddiqui Kamran, The effect of mixed convection on the structure of channel flow at low Reynolds numbers, International Journal of Heat and Fluid Flow, 46, 2014. Crossref
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Elatar Ahmed, Siddiqui Kamran, Flow development during low Reynolds number mixed convection, International Journal of Thermal Sciences, 90, 2015. Crossref