A low-dissipation solver based on OpenFOAM designed for large eddy simulation in compressible flows
文献类型:会议论文
作者 | Lee YC(李亚超)1,2![]() ![]() ![]() |
出版日期 | 2017-03 |
会议日期 | 6-9 March 2017 |
会议地点 | Xiamen, China |
关键词 | Low-dissipation compressible Solver, Skew-symmetric Form, Benchmark Flow Problems |
英文摘要 | To reduce the numerical dissipation in compressible flow modeling, a low-dissipation compressible solver is developed for large eddy simulation based on the original compressible solver rhoCentralFoam within the framework of an open source computational fluid dynamics package OpenFOAM. In rhoCentralFoam, the central-upwind scheme of Kurganov and Tadmor is applied to capture flow discontinuities, but its dissipation is too strong to resolve fine turbulence structures under finite mesh resolutions. The current lowdissipation solver adopts a new hybrid scheme, which combines the dissipative KurganovTadmor scheme with the nondissipative central scheme. By aid of a shock sensor, the dissipative scheme is used to capture the flow discontinuities near shock waves and the central scheme is used to resolve the turbulence structures in the smooth flow area. In the framework of unstructured mesh, the central scheme is extended from second order to forth order, which greatly reduces the dispersion error and weakens the oscillations near flow discontinuities. To improve the numerical stability of the central scheme, the skewsymmetric form of the convective term is adopted to preserve the local kinetic energy and maintain the self-stability of central scheme without adding an explicit dissipative term. In addition, a low-storage third-order TVD Runge-Kutta method for temporal discretization is newly implemented in the low-dissipation solver to further reduce the numerical dissipation. A series of benchmark flow problems, such as Sod shock tube test, Shu-Osher problem, Green-Taylor vortex evolution, and wall-bounded turbulence generation based on synthetic eddy method, are computed and compared to examine the low-dissipation solver’s capability in capturing flow discontinuities as well as resolving fine turbulence structures. The accuracy and stability of the low-dissipation solver are further validated against experimental data for a scramjet model with a supersonic airstream passing over the flame holder structure |
会议录 | International Space Planes and Hypersonic Systems and Technologies Conferences
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语种 | 英语 |
URL标识 | 查看原文 |
源URL | [http://dspace.imech.ac.cn/handle/311007/84804] ![]() |
专题 | 力学研究所_高温气体动力学国家重点实验室 |
通讯作者 | Yao W(姚卫); Fan XJ(范学军) |
作者单位 | 1.School of Engineering Science, University of Chinese Academy of Sciences 2.State Key Laboratory of High Temperature Gas Dynamics, Institute of Mechanics, CAS |
推荐引用方式 GB/T 7714 | Lee YC,Yao W,Fan XJ. A low-dissipation solver based on OpenFOAM designed for large eddy simulation in compressible flows[C]. 见:. Xiamen, China. 6-9 March 2017. |
入库方式: OAI收割
来源:力学研究所
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