| 不同亚格子模式在后台阶湍流流动大涡模拟中的应用 |
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| 引用本文： | 王兵,张会强,王希麟,郭印诚,林文漪.不同亚格子模式在后台阶湍流流动大涡模拟中的应用[J].工程热物理学报,2003,24(1):157-160. |
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| 作者姓名： | 王兵 张会强 王希麟 郭印诚 林文漪 |
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| 作者单位： | 清华大学工程力学系,北京,100084 |
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| 基金项目： | 国家自然科学基金资助项目(No.19972036) |
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| 摘 要： | 本文用大涡模拟方法研究了湍流后台阶流场中的大涡演变过程,并在此基础上研究了目前大涡模拟中比较常用的六种亚格子模式。在相同的流动几何参数以及计算条件下,给出了不同亚格子模式下湍流流动瞬时压力场以及流场中瞬时粘性大小的分布,尤其给出了流场瞬时演变的大尺度涡结构。将六种亚格子模式从回流区长度、计算时间、计算结果的准确性和流场稳定性等不同角度进行了比较。为选取合适的亚格子模式深入研究湍流耗散机理奠定了基础。
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| 关 键 词： | 亚格子模式 大涡模拟 后台阶流动 |
| 文章编号： | 0253-231X(2003)01-0157-04 |
| 修稿时间： | 2002年10月30 |
LARGE EDDY SIMULATION OF BACKWARD-FACING STEP TURBULENT FLOW USING DIFFERENT SGS MODELS |
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| WANG Bing ZHANG Hui-Qiang WANG Xi-Lin GUO Yin-Cheng LIN Wen-Yi.LARGE EDDY SIMULATION OF BACKWARD-FACING STEP TURBULENT FLOW USING DIFFERENT SGS MODELS[J].Journal of Engineering Thermophysics,2003,24(1):157-160. |
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| Authors: | WANG Bing ZHANG Hui-Qiang WANG Xi-Lin GUO Yin-Cheng LIN Wen-Yi |
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| Abstract: | By the large eddy simulation method, the evolution of vortexes in the two-dimensional backward-facing step turbulence flow is studied. Based on these, six kinds of SGS models are discussed. With the same flow and calculation condition, the turbulent instantaneous pressure flied, the flow viscosity and even more the large eddy structures gained by LES using different SGS models are shown. Six kinds of SGS models are contrasted from the points of the length of recirculation, calculation time, validity of numerical results and flow stability. The present research paves a way for the further study of turbulence dissipation using the most appropriate SGS model. |
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| Keywords: | SGS model large eddy simulation backward-facing step flow |
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