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本文报道二维暂态、Dirichlet和Neumann两种边值条件下水平环形湿饱和多孔柱体中自然对流的数值计算和实验检验。计算范围:瑞利数Ra≤10~3;半径比R_o(=r_o/r_i)为1—10。着重讨论流场、温度场及Nu随时间变化的规律。计算的径向温度分布和(?)与相应工况的实验数据吻合良好。
This paper reports the numerical calculation and experimental verification of natural convection in a horizontal annular wet saturated porous column with two kinds of transient states, Dirichlet and Neumann boundary conditions. Calculation range: Rayleigh number Ra≤10 ~ 3; Radius ratio R_o (= r_o / r_i) is 1-10. Focus on the flow field, temperature field and Nu regularity with time. The calculated radial temperature distribution and (?) Are in good agreement with the experimental data of the corresponding working conditions.