多孔介质通道中单相流阻力特性数值模拟

以流体分析软件Fluent6.3为平台,建立了颗粒填充多孔介质通道内单相流体的流动阻力预测模型。结果表明:该预测模型具有较高的计算精度,对于无量纲直径D=0.16、0.1和0.04的多孔介质通道,预测值与实验值间的相对偏差分别小于5%、7%和7%;流动阻力随D的增大而减小;对于多孔介质中单相流体的压降,现有模型中的惯性阻力修正系数CF对计算结果的影响显著,不能对阻力压降进行很好地预测。

Numerical Simulation of Single-Flow Resistance in Porous Media Channel

A model for predicting single-phase flow resistance in channel filled with particles was developed by using Fluent6.3 software. It is showed that the predictions agree well with the experimental data for nondimensional D=0.16, 0.1 and 0.04; flow resistance increases with decrease of non-dimension diameter D; the pressure drop of single-phase in porous media channel can not be well predicted by existing models, from which the numerical results are considerably influenced by the selected methods for calculating the drag coefficient C_F in these models.