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Optimal Positioning of Strips for Heat Transfer Reduction within an Enclosure

Heat transfer reduction capabilities of a vertical or a horizontal adiabatic partial partition fixed in a differentially heated cavity with insulated top and bottom walls are analyzed and compared. The effects of length and location of the partition is taken into account for aspect ratios from 1 to 4 and for Rayleigh numbers from 103 to 106. Different characteristics of square and higher aspect ratio cavities are compared and a comprehensive correlation of the heat transfer reduction is introduced, incorporating all the pertinent parameters. Based on our results, vertical baffles more efficiently reduce heat transfer, in most cases.