Basic thought of the large eddy simulation(LES) is presented. It is pointed out that the efficiency of LES depends mainly on the four factors--Large scale eddies, reasonable calculating scheme, appropriate filter and subsgrid mode.

• 简述了大涡模拟的基本思想,指出大涡模拟的效率主要取决于四个因素,即流动中须有大尺度涡存在、合理的计算格式、合适的滤波器和亚格子应力模型。