Simulating High Reynolds Number Flow by Lattice Boltzmann Method

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2005,（6）
• 页码范围: 1456-1459
• 页数: 4页
• 语种: 英文

摘要

A two-dimensional channel flow with different Reynolds numbers is tested by using the lattice Boltzmann method under different pressure and velocity boundary conditions. The results show that the simulation error increases,and the pressure and the flow rate become unstable under a high Reynolds number. To improve the simulation precision under a high Reynolds number, the number of fluid nodes should be enlarged. For a higher Reynoldsnumber flow, the velocity boundary with an approximately parabolic velocity profile is found to be more adaptive.Blood flow in an artery with cosine shape symmetrical narrowing is then simulated under a velocity boundary condition. Its velocity, pressure and wall shear stress distributions are consistent with previous studies.