Simulating High Reynolds Number Flow by Lattice Boltzmann Method
KANG Xiu-Ying1, LIU Da-He1, ZHOU Jing1, JIN Yong-Juan2
1Applied Optics Beijing Area Major Laboratory, Department of Physics, Beijing Normal University, Beijing 100875
2Institute of Hematology, Chinese Academy of Medical Sciences, Tianjin 300020
Simulating High Reynolds Number Flow by Lattice Boltzmann Method
KANG Xiu-Ying1;LIU Da-He1;ZHOU Jing1;JIN Yong-Juan2
1Applied Optics Beijing Area Major Laboratory, Department of Physics, Beijing Normal University, Beijing 100875
2Institute of Hematology, Chinese Academy of Medical Sciences, Tianjin 300020
Abstract： 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 Reynolds-number 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.
KANG Xiu-Ying;LIU Da-He;ZHOU Jing;JIN Yong-Juan. Simulating High Reynolds Number Flow by Lattice Boltzmann Method[J]. 中国物理快报, 2005, 22(6): 1456-1459.
KANG Xiu-Ying, LIU Da-He, ZHOU Jing, JIN Yong-Juan. Simulating High Reynolds Number Flow by Lattice Boltzmann Method. Chin. Phys. Lett., 2005, 22(6): 1456-1459.
2005, Vol. 22 
