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ISSN Druckformat: 1091-028X
ISSN Online: 1934-0508
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OPTIMUM POROUS INSERT CONFIGURATIONS FOR ENHANCED HEAT TRANSFER IN CHANNELS
ABSTRAKT
Studies to establish the optimum arrangement and thickness of porous inserts in parallel plate channels subjected to uniform heat flux for enhancement of forced convective heat transfer are reported here. The flow and thermal fields have been considered as fully developed. The different arrangements considered are: (1) a given amount of porous material is attached to one of the walls of the channel (arrangement 1), (2) distributed equally at the two walls (arrangement 2), and (3) placed as one insert in the middle of the channel (arrangement 3). It has been found that the configuration described in arrangement 3 above yields the maximum enhancement in heat transfer per unit pressure gradient followed by arrangements 1 and 2. The optimum porous fraction for the configuration (arrangement 3) varies from 0.675 to 0.450 as the Darcy number increases from 0.0005 to 0.05.
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