| An improved dynamic subgrid-scale model and its application to large eddy simulation of rotating channel flows |
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| 引用本文： | LIU Nansheng,LU Xiyun & ZHUANG Lixian Department of Mechanics and Mechanical Engineering,University of Science and Technology of China,Hefei 230026,China. An improved dynamic subgrid-scale model and its application to large eddy simulation of rotating channel flows[J]. 中国科学G辑(英文版), 2004, 47(4): 463-476. DOI: 10.1360/03yw0228 |
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| 作者姓名： | LIU Nansheng LU Xiyun & ZHUANG Lixian Department of Mechanics and Mechanical Engineering University of Science and Technology of China Hefei 230026 China |
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| 作者单位： | LIU Nansheng，LU Xiyun & ZHUANG Lixian Department of Mechanics and Mechanical Engineering，University of Science and Technology of China，Hefei 230026，China |
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展计划(973计划)，高等学校博士学科点专项科研项目 |
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| 摘 要： | Rotating turbulence occurs extensively in nature and engineering circumstances. Meanwhile, understanding physical mechanisms of the rotating turbulence is important to the fundamental research of turbulence. The turbulent flow in rotating frames undergoes two kinds of Coriolis force effects. First, a secondary flow is induced in the case that there is a mean vorticity component perpendicular to the rotating axis. Second, there are augmenting or suppressing effects on the turbulence if there i…
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| 收稿时间： | 2006-08-15 |
An improved dynamic subgrid-scale model and its application to large eddy simulation of rotating channel flows |
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| LIU Nansheng,LU Xiyun,ZHUANG Lixian. An improved dynamic subgrid-scale model and its application to large eddy simulation of rotating channel flows[J]. Science in China(Physics Astronomy), 2004, 47(4): 463-476. DOI: 10.1360/03yw0228 |
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| Authors: | LIU Nansheng LU Xiyun ZHUANG Lixian |
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| Affiliation: | Department of Mechanics and Mechanical Engineering, University of Science and Technology of China,Hefei 230026, China |
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| Abstract: | A new dynamic subgrid-scale (SGS) model, which is proved to satisfy the principle of asymptotic material frame indifference (AMFI) for rotating turbulence, is proposed based on physical and mathematical analysis. Comparison with direct numerical simulation (DNS) results verifies that the new SGS model is effective for large eddy simulation (LES) on rotating turbulent flow. The SGS model is then applied to the LES of the spanwise rotating turbulent channel flow to investigate the rotation effect on turbulence characteristics, budget terms in the transport equations of resolved Reynolds stresses, and flow structures near the wall regions of the rotating channel. |
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| Keywords: | large eddy simulation (LES) dynamic subgrid-scale (SGS) model rotating turbulent channel flow asymptotic material frame indifference (AMFI). |
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