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MIXED CONVECTION-RADIATION HEAT TRANSFER IN A VENTED PARTITIONED RECTANGULAR ENCLOSURE

Volume 3, Issue 3, 2011, pp. 203-217
DOI: 10.1615/ComputThermalScien.2011002585
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ABSTRACT

A numerical study has been performed on mixed convection coupled to radiation in a vented enclosure by a finite difference method. An external fluid flow enters the enclosure through an opening in the lower part of the left vertical wall and exits from another opening located on the upper part of the right vertical wall. The cavity is provided with an adiabatic partition of finite thickness located vertically on the upper horizontal wall. Air is considered as cooling fluid; it is radiatively non participating. The effect of the governing parameters, which are the Reynolds number, 200 ≤ Re ≤ 5000, the partition position from the inlet, 0.25 ≤ Lb ≤ 1.75, and the emissivity of the walls, 0 ≤ ε ≤ 1, on fluid flow and heat transfer characteristics are analyzed and discussed. Maximum and mean temperatures are also presented versus the controlling parameters. Results of the study show that, by an appropriate choice of the governing parameters, the heat transfer across the cavity can be enhanced and the mean and maximum temperatures could be reduced.

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