Roe scheme for large eddy simulation of homogeneous decaying turbulence

被引：0

作者：

Li, Xue-Song ^{[1
]}

机构：

[1] Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing,100080, China

来源：

Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics | 2015年 / 36卷 / 11期

关键词：

Turbulence;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Roe scheme was proved to have too large numerical dissipation for large eddy simulation (LES). In this research the dissipation term of Roe scheme is subdivided into five parts, and then the dissipation characteristic of each part is studied. Through the LES of homogeneous decaying turbulence, the main sources of numerical dissipation of Roe scheme are due to the basic upwind dissipation term and velocity-difference-driven modification term of the interface pressure, and the dissipation value of each term is larger than the actual required value. Multiplying the coefficient of the basic upwind dissipation term by 0.5, however, the dissipation characteristic is close to ideal. It means that the subgrid turbulence dissipation can be replaced by the numerical dissipation. This research is useful to improve Roe scheme for LES. © 2015, Science Press. All right reserved.

引用

页码：2348 / 2351