基于三维CFD-DEM的多孔介质流场数值模拟

任石磊; 韩飞鹏; 谢斌; 黄波; 郝鹏飞

doi:10.21656/1000-0887.370326

基于三维CFD-DEM的多孔介质流场数值模拟

doi: 10.21656/1000-0887.370326

¹清华大学核能与新能源技术研究院, 北京 100084;²中国石油天然气股份有限公司新疆油田工程技术研究院, 新疆克拉玛依 834000;³清华大学航天航空学院,北京 100084

基金项目: 国家重点基础研究发展计划（973计划）(2014CB046506;2014CB046803)；国家自然科学基金(11372061;11402049;11602076)

详细信息

作者简介:
任石磊(1992—)，男，苗族，硕士(E-mail: xmsun@tsinghua.edu.cn);郝鹏飞(1970—)，男，副教授，博士(通讯作者. E-mail: haopf@tsinghua.edu.cn).

中图分类号: O357.3
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出版历程
- 收稿日期: 2016-10-24
- 修回日期: 2017-09-04
- 刊出日期: 2017-10-15

Numerical Simulation of Flow Fields in Porous Media Based on the 3D CFD-DEM

¹Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, P.R.China;²Engineering Institute of Xinjiang Oilfield, PetroChina Co. Ltd., Karamay, Xinjiang 834000, P.R.China;³School of Aerospace Engineering, Tsinghua University, Beijing 100084, P.R.China

Funds: The National Basic Research Program of China (973 Program)(2014CB046506;2014CB046803);The National Natural Science Foundation of China(11372061;11402049;11602076)

摘要

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.
- 多孔介质 /
- Darcy定律 /
- 离散单元法 /
- 数值模拟 /
- 多尺度
Abstract: 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.
- porous medium /
- Darcy law /
- DEM /
- numerical simulation /
- multi-scale

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