非均匀格子Boltzmann方法模拟方柱绕流  

Simulation of Flow Past Square Cylinders with a Nonuniform Lattice Boltzmann Method

作　　者：王广超[1] 施保昌[1] 邓滨[1] 

机构地区：[1]华中科技大学数学系,湖北武汉430074

出　　处：《应用基础与工程科学学报》2003年第4期335-344,共10页Journal of Basic Science and Engineering

基　　金：国家自然科学基金(60073044);国家重大基础研究规划(G1999022207)资助项目

摘　　要：应用非均匀格子Boltzman方法对方柱绕流的三种情况进行详细数值模拟.在第1种情况中,方柱位于流场中央,模拟了卡门涡街现象,给出了斯特鲁哈数随雷诺数变化曲线;在第2种情况中,方柱位于流场壁面,分析了雷诺数对方柱后回流区的影响;在第3种情况中,两方柱并列在流场中央,考察了方柱间距对流场的影响.Three cases of flow past square cylinder and two square cylinders are investigated in detail with a nonuniform lattice Boltzmann method. For case 1, the square cylinder is located at the center of the channel, the krmn vortex is successfully simulated and the Strouhal numbers at different Reynolds numbers are given; For case 2 , the square cylinder is located at a wall of flow field, the recirculation lengths behind the square cylinder at different Reynolds numbers are considered; For case 3, two square cylinders arranged side by side in the center of the channel,the flow features at different spacing ratios are studied.

关 键 词：非均匀格子Boltzmann方法 方柱绕流 非均匀网格 非平衡态外推 并行方柱 漩涡脱落 回流 

分 类 号：O351.2[理学—流体力学]