Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China;
Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China;
Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China;
Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China;
Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China;
large eddy simulation; particle diffusion; backward-facing step;