多孔介质数值仿真模型研究

A Numerical Simulation Model of Multi-porous Media

多孔介质材料广泛应用于石油与化工等工程领域,该材料以其特殊的结构属性使得数值模型的建立较为困难,建立有效的多孔介质数值仿真模型能提高数值计算的精度。利用Workbench的Fluent流体仿真软件建立了直排颗粒堆积模型、叉排颗粒堆积模型和毛细管模型以模拟多孔介质材料,并基于k-ε湍流模型分别模拟了上述3种模型下的单相流流动特性,监测了3种模型的进出口压力,从而得出进出口的压差。3种模型的进出口压差对比发现,叉排颗粒堆积模型具有较大的流动阻力,毛细管模型的流动阻力最小。

Multi-porous media material is widely used in the fields of petroleum and chemical engineering.But it is difficult to establish a numerical model for its special structure and attribute,an effective simulation model is beneficial for improving the calculation precision.In this paper,Fluent module in finite element analysis software Workbench is used to establish a linear particle accumulation,a cross particle accumulation model and a capillary model to simulate the porous media material.And k-εmodel is applied to simulate the single phase flow under condition of the above 3models.The inlet and outlet pressures are monitored for the 3models,the pressures of the models are compared,it is found out that there is higher flow drag in the cross particle accumulation model,the flow drag is the minimum in the capillary model.