| UNSTEADY／STEADY NUMERICAL SIMULATION OF THREE-DIMENSIONAL INCOMPRESSIBLE NAVIER-STOKES EQUATIONS ON ARTIFICIAL COMPRESSIBILITY |
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| 引用本文： | 温功碧,陈作斌.UNSTEADY／STEADY NUMERICAL SIMULATION OF THREE-DIMENSIONAL INCOMPRESSIBLE NAVIER-STOKES EQUATIONS ON ARTIFICIAL COMPRESSIBILITY[J].应用数学和力学(英文版),2004,25(1):59-72. |
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| 作者姓名： | 温功碧 陈作斌 |
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| 作者单位： | [1]TheDepartmentMechanicsandEngineeringScience,StateKeyLaboratoryforTurbulenceandComplicatedSystemResearch,PekingUniversity,Beijing100871,P.RChina [2]ChinaAerodynamicsResearchandDevelopmentCenter,Mianyang,Sichuan621000,P.R.China |
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| 摘 要： | A mixed algorithm of central and upwind difference scheme for the solution of steady/unsteady incompressible Navier-Stokes equations is presented. The algorithm is based on the method of artificial compressibility and uses a third-order flux-difference splitting technique for the convective terms and the second-order central difference for the viscous terms. The numerical flux of semi-discrete equations is computed by using the Roe approximation. Time accuracy is obtained in the numerical solutions by subiterating the equations in pseudotime for each physical time step. The algebraic turbulence model of Baldwin-Lomax is ulsed in this work. As examples, the solutions of flow through two dimensional flat, airfoil, prolate spheroid and cerebral aneurysm are computed and the results are compared with experimental data. The results show that the coefficient of pressure and skin friction are agreement with experimental data, the largest discrepancy occur in the separation region where the lagebraic turbulence model of Baldwin-Lomax could not exactly predict the flow.
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| 关 键 词： | 不可压缩Navier-Stokes方程 稳态流 非稳态流 数值模拟 人工可压缩性 生物力学 |
| 收稿时间： | 18 June 2002 |
Unsteady/steady numerical simulation of three-dimensional incompressible Navier-Stokes equations on artificial compressibility |
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| Wen Gong-bi,Chen Zuo-bin.Unsteady/steady numerical simulation of three-dimensional incompressible Navier-Stokes equations on artificial compressibility[J].Applied Mathematics and Mechanics(English Edition),2004,25(1):59-72. |
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| Authors: | Wen Gong-bi Chen Zuo-bin |
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| Institution: | 1. The Department Mechanics and Engineering Science, State Key Laboratory for Turbulence and Complicated System Research, Peking University, Beijing 100871, P. R. China;
2. China Aerodynamics Research and Development Center, Mianyang, Sichuan 621000, P. R. Chin |
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| Abstract: | A mixed algorithm of central and upwind difference scheme for the solution of steady/unsteady incompressible Navier-Stokes equations is presented. The algorithm is based on the method of artificial compressibility and uses a third-order flux-difference splitting technique for the convective terms and the second-order central difference for the viscous terms. The numerical flux of semi-discrete equations is computed by using the Roe approximation. Time accuracy is obtained in the numerical solutions by subiterating the equations in pseudotime for each physical time step. The algebraic turbulence model of Baldwin-Lomax is ulsed in this work. As examples, the solutions of flow through two dimensional flat, airfoil, prolate spheroid and cerebral aneurysm are computed and the results are compared with experimental data. The results show that the coefficient of pressure and skin friction are agreement with experimental data, the largest discrepancy occur in the separation region where the lagebraic turbulence model of Baldwin-Lomax could not exactly predict the flow. |
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| Keywords: | incompressible Navier-Stokes equation numerical simulation artificial compressibility central and upwind difference scheme mixed algorithm flow over a prolate spheroid steady/unsteady flow |
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