Simulation of non-Newtonian (Power-law) fluid flow past a row of square cylinders
Simulation of non-Newtonian (Power-law) fluid flow past a row of square cylinders
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模拟非牛顿（幂律）流体流经一排方形圆柱体
DOI：
10.1007/s11433-011-4270-8
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Jie Peng
中科院分区：
文献类型：
--
作者：
Zhiqiang Zhou;Jie Peng
采用格子玻尔兹曼方法（LBM）对幂律流体绕过一排均匀排列的方柱的流动进行了研究。假定流动为二维且不可压缩。假设松弛时间τ与剪切相关，并通过一个与局部剪切速率有关的可变参数来确定。主要关注剪切稀化/剪切增稠特性以及柱间距对射流汇合的影响。得到了流动的分岔图，其中包括双射流和四射流的汇合情况。结果表明，由于剪切稀化特性的作用，一阶和二阶叉式分岔均提前发生，而由于剪切增稠特性的作用，分岔则延迟发生。
The power-law fluid flow past a row of uniform placed square cylinders is investigated using the Lattice Boltzmann method (LBM). The flow is assumed to be two-dimensional and incompressible. The relaxation time τ is assumed to be shear-dependent and determined by using a variable parameter related to the local shear rate. The effects of both shear-thinning/ shear-thickening property and the cylinder spacing on the confluence of the jets are mainly concerned. The bifurcation diagrams of the flow are obtained, which include confluences of double and quadruple jets. The results show that both the first and second pitchfork bifurcations are advanced due to the effect of the shear-thinning property, and postponed due to the shear-thickening property.
影响因子：
4.6
作者：
Zou, QS;He, XY
通讯作者：
He, XY