摘要
将多孔介质局部细观流动与基于Darcy定律的宏观物理模型相结合,应用三维CFD-DEM对多孔介质流场进行局部细观数值模拟,得到多孔介质的惯性阻力系数和粘性阻力系数.并将其作为参数提供给基于Darcy定律的CFD多孔介质模型,从而可用于更大规模的多孔介质流场计算.应用Voronoi多面体作为网格单元,解决了CFD-DEM中网格孔隙率精确计算的困难.文中发展的多尺度结合应用的研究方法,在计算精度和计算效率的矛盾中找到了较好的平衡,对于工程应用而言,有节约实验成本、提高计算结果可靠性的功效.
In numerical simulation the microscopic flow in porous media was combined with the macroscopic porous media model based on the Darcy law. The 3D CFD-DEM was applied to the microstructure of porous media to figure out the inertial resistance and the viscous resistance. Then,the resistances obtained with the CFD-DEM were introduced in the porous media model based on the Darcy law. The Voronoi polyhedron was used in mesh generation,so the porosity of each mesh cell was calculated precisely.In this way,larger-scale fluid fields in porous media can be computed efficiently. For engineering applications,the proposed method balances between accuracy and efficiency of multi-scale methods,effectively saving the experiment cost and improving the computation reliability.
作者
任石磊
韩飞鹏
谢斌
黄波
郝鹏飞
REN Shi-lei HAN Fei-peng XIE Bin HUANG Bo HAO Peng-fei(Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, P.R. China Engineering Institute of Xinjiang Oilfield, PetroChina Co. Ltd., Karamay , Xinjiang 834000, P.R. China School of Aerospace Engineering, Tsinghua University, Beijing 100084, P.R. China)
出处
《应用数学和力学》
CSCD
北大核心
2017年第10期1093-1102,共10页
Applied Mathematics and Mechanics
基金
中国石油科技创新基金(2014D-5006-0208)
