透水率に異方性を有する飽和多孔質層内の側方加熱による自然対流熱伝達 : (第2報, ヘル・ショーセルによる実験)

概要

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Natural covection heat transfer and flow structure in an anisotropic porous medium of square cavity saturated with Boussinesq fluid has been studied experimentally using a Hele-Shaw cell. The permeability ratio defined by K=K_y/K_x was put to three different values;0.4, 1 and 2.5. The convection patterns at three different permeability ratios are visualized for several different Rayleigh numbers by the pH indicator method. When K is 0.25, the visualized flow is mainly in the vertical direction. On the contrary for K=4 the convecting flow is in the horizontal direction. The average heat transfer coefficients are also measured, and the corresponding Nusselt number are plotted as a function of K. It is found that the corresponding Nusselt numbers are scaled with (KRa)^<1/2>. The experimental results of flow pattern and heat transfer are accord with those obtained by our previous theory.
一般社団法人日本機械学会の論文
2000-11-25