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湍流边界层拟序结构的大涡模拟研究 被引量:1

LES OF COHERENT STRUCTURE IN TURBULENCE BOUNDARY LAYER
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摘要 采用动力亚格子模型,利用大涡模拟方法模拟了雷诺数为13000的充分发展槽道湍流流动。从瞬时速度和脉动 速度场、脉动速度相关、均方根脉动涡量分布、以及瞬时涡量场等多个方面,对湍流边界层流动的拟序结构进行了分析, 包括近壁区小尺度湍流结构和瞬态过程,如条纹结构、喷射和扫掠过程、以及近壁旋涡结构等。 The full developed turbulent flow in channels at Reynolds number 13000 is simulated using Large Eddy Simulation with dynamic sub-grid model. Based on the analysis of instant velocity and fluctuated velocity field, velocity correlation, root mean square fluctuated vorticity distribution, and instant vorticity field, the coherent structures of turbulent boundary layer flow are showed.
出处 《工程热物理学报》 EI CAS CSCD 北大核心 2004年第4期579-581,共3页 Journal of Engineering Thermophysics
基金 国家自然科学基金资助项目(No.50206001)
关键词 大涡模拟 近壁流动 湍流 拟序结构 large eddy imulation near wall flow turbulent coherent structure
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参考文献8

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