| 各向同性紊流能量衰减的大涡模拟 |
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| 引用本文： | 夏健,刘锋.各向同性紊流能量衰减的大涡模拟[J].计算物理,2005,22(1):61-64. |
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| 作者姓名： | 夏健 刘锋 |
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| 作者单位： | 1. 南京航空航天大学空气动力学系, 江苏 南京 210016;2. 加州大学尔湾分校, 加利福尼亚 CA 92697-3975, 美国 |
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| 摘 要： | 在多重网格驱动的,高效且得到充分验证的有限体积方法的基础上发展了可压缩流大涡模拟的方法.空间离散采用Jameson的中心格式附加二阶和四阶耗散的方法,时间推进则采用了双时间步长的方法.亚格子剪切应力张量和亚格子热通量用Smagorinsky模型进行模拟.通过对各向同性紊流能量衰减的模拟来验证本方法的准确性和高效性,模拟得到的能量谱和紊流动能衰减历程与过滤后的CBC实验数据吻合良好.
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| 关 键 词： | 大涡模拟 紊流 有限体积法 |
| 收稿时间： | 2004-01-08 |
| 修稿时间： | 2004-07-02 |
A Large Eddy Simulation of Isotropic Turbulence Decay |
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| XIA Jian,LIU Feng.A Large Eddy Simulation of Isotropic Turbulence Decay[J].Chinese Journal of Computational Physics,2005,22(1):61-64. |
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| Authors: | XIA Jian LIU Feng |
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| Institution: | 1. Department of Aerodynamics, Nanjing University of Aerodynamics and Astronautcis, Nanjing 210016, China;2. Department of Mechanical & Aerospace Engineering, University of California, Irvine, CA 92697-3975, USA |
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| Abstract: | A compressible large eddy simulation(LES)technique based on a highly efficient and well validated finite volume,multigrid driven method is developed.The Jameson's central scheme with second and fourth order artificial dissipation is used for space discretization and dual time methodology is implemented for time marching.The subgrid scale stress tensor and the subgrid scale heat flux are simulated with Smagorinsky model.A typical simulation of isotropic turbulence decay is performed to verify the accuracy and efficiency of this method.The simulated time evolution of energy spectra and decay of the resolved turbulence kinetic energy are in good agreement with the filtered experimental CBC data. |
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| Keywords: | large eddy simulation turbulence finite volume method |
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