本文对后台阶分离流动中涡结构的演变进行了大涡模拟，研究了流场结构的变化规律。
In this paper, the evolution of eddy structures in the backward-facing step flow was studied by using large eddy simulation.
建立了微可压缩流理论和大涡模拟方法相结合的空化流数学模型，为四川大学工学博士学位论文孔板泄洪洞空化初生的研究开辟了一条新途径。
Established a mathematical model to simulate the instantaneous flow fields and cavitation by combining the weakly compressible fluid theory and the Large Eddy Simulation method.
网格滤波截断的亚格子湍能远小于流场总能量，验证了大涡模拟方法的有效性。
The sub-grid scale turbulent energy imposed by a box filter was found to be only a small portion of the total turbulent kinetic energy, which validates the numerical method.
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