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Abstract

This paper discusses about the effect of length ratio on mixed convection heat transfer through discrete heat sources placed inside a vertical channel. The distinct heat source assembly is the combination of alternative Bakelite and aluminum strips. The aim of the study is to investigate the effect of length ratio of the Bakelite strips on heat transfer and hot spot appearing on the heater surfaces. Four different length ratios of the Bakelite strips are considered in the present numerical exploration. The problem is solved as conjugate heat transfer as it involves aluminum and Bakelite solids along with fluid flowing in the vertical channel. The result shows that the hot spot reduces on the heater surfaces as Bakelite length ratio increases. It is also observed that excess temperature on all the heaters reduces as inlet fluid velocity increases. The results of excess temperature of all the heaters along with temperature contours are presented and discussed.

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Keywords

Vertical channel, Length ratio, Discrete Heat source, Conjugate heat transfer.