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Experimental study of natural convection in fluid-superposed porous layers heated locally from below

机译:从下方局部加热的流体叠加多孔层中自然对流的实验研究

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An experimental study of natural convection in fluid-superposed porous layers heated locally from below is reported. Measurements are made in a rectangular chamber with 3 mm DIA glass beads as the porous layer and distilled water as the saturating fluid. The effects of the heater-to-cavity length ratio and the porous layer-to-cavity height ratio on the overall heat transfer coefficients are reported. Average heat transfer coefficients over the heated surface increase with a decrease in porous layer-to-cavity height ratio, but no clear effect of heater-to-cavity length ratio is seen. Temperature profiles in the domain reveal a plume like flow with a single pair of circulating cells and evidence of convective motion inside the porous layer.
机译:报道了从下方局部加热的流体叠加多孔层中自然对流的实验研究。在矩形腔中进行测量,其中3 mm DIA玻璃珠作为多孔层,蒸馏水作为饱和液。报道了加热器与腔的长度比和多孔层与腔的高度比对总传热系数的影响。加热表面上的平均传热系数随多孔层与腔体高度比的减小而增加,但是看不到加热器与腔体长度比的明显影响。区域中的温度分布显示出具有一对循环单元的羽状流,并证明了多孔层内部的对流运动。

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