文献类型：期刊文献

中文题名：幂律流体扩展流动的格子Boltzmann模拟分析

英文题名：Simulation of sudden expansion flows for power-law fluids with the lattice Boltzmann method

作者：何录武[1];薛盼[1];李勇[1]

机构：[1]华东理工大学机械与动力工程学院,上海200237

年份：2016

卷号：52

期号：5

起止页码：708

中文期刊名：兰州大学学报（自然科学版）

外文期刊名：Journal of Lanzhou University(Natural Sciences)

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金：国家自然科学基金项目(11372111)

语种：中文

中文关键词：格子Boltzmann方法;幂律流体;分布函数;扩展流;雷诺数

外文关键词：lattice Boltzmann method; power-law fluid; distribution function; sudden expansion flow;Reynolds number

摘要：应用格子Boltzmann方法和D2Q9格子模型,结合剪切速率的局部计算方法以及非平衡外推边界处理格式,数值模拟了幂律流体在3:1扩展流道(2D)中的流动行为.获得了不同雷诺数Re和幂律指数n下扩展流动的流线分布,计算出了漩涡的涡心位置和大小,分析了Re和n对扩展流动特点的影响.模拟结果表明本模型和处理方法具有良好的精度和稳定性.
Based on the lattice Boltzmann method and the D2Q9 lattice model, the plane 1 ： 3 sudden expansion flow of power-law fluid was studied numerically with the local calculation method for the shear rate and the non-equilibrium extrapolation method for the conditions. The streamline patterns for sudden expansion flow of the power-law with different Reynolds numbers Ro and power-law indices n were obtained, and the positions of the vortex center and length of the vortex were also listed. The influences of Rs and n on sudden expansion flow of power-law fluid were discussed. The results also contrmed that this method present a fine accuracy and sta- bility.