气 -液两相在多孔介质内同向向上流动的CFD研究

基于计算流体力学中欧拉模型,研究了气-液两相在球形多孔介质填充床内同向向上流动情况.分别采用Tung&Siefken模型、Schulenberg模型以及Attou模型通过用户自定义功能的形式添加气固、液固、气液间曳力程序对填充床流动情况进行CFD三维数值模拟.对其模拟结果与实测数据进行对比发现:Tung&Siefken的模型更适合模拟在常温常压下直径在2～8mm的球形多孔介质内气-液两相流流动,此模型CFD数值模拟的压降差、持液量结果均与实测数据吻合很好.

CFD Simulation of Gas-liquid Two Phase Cocurrent Upflow through Porous Media

Based on computational fluid dynamics Euler multiphase model,gas-liquid two-phase co-current upflow through packed bed was investigated.Tung & Siefken model,Schulenberg model and Attou k-fluid model were applied,respectively.The gas-particle,liquid-particle and gas-liquid drag force programs were implemented to CFD three-dimensional numerical simulation with user defined functions.A comparison of the experiment data has shown that Tung & Siefken’s model was more suitable for the numerical simulation of gas-liquid two-phase upflow through porous media packed with 2~8 mm sphere under normal temperature and pressure.The CFD numerical simulated values of pressure drop and liquid hold-up by Tung & Siefken’s model were consistent with the experiment results.