本文采用大涡模拟的方法,对二维槽道湍流流动进行了数值模拟.采用Chorin的分步投影法求解大尺度涡运动的Navier-Stokes方程,小尺度涡采用三种亚格子(SGS)模式分别模拟,给出了不同亚格子涡粘性模式下的模拟结果.对固壁面采用了壁函数.模拟结果再现了二维槽道流动拟序结构的发展演变过程.通过对不同入口速度下的瞬态流场的比较,揭示了入口速度分布对流场的影响.
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