Lattice Boltzmann simulation of shear viscosity of suspensions containing porous particles
Lattice Boltzmann simulation of shear viscosity of suspensions containing porous particles
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DOI：
10.1016/j.ijheatmasstransfer.2017.09.060
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发表时间：
2018
影响因子：
5.2
通讯作者：
Ao Xu;Le Shi;T. Zhao
中科院分区：
文献类型：
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作者：
Ao Xu;Le Shi;T. Zhao
我们提出了含有多孔颗粒的稀悬浮液的三维晶格玻尔兹曼模拟。多孔颗粒周围和内部的流体流动由体积平均宏观方程以本征相平均值来描述。计算库埃特流中悬浮颗粒的能量耗散以获得悬浮液的相对粘度。结果表明，悬浮液的相对粘度随颗粒体积分数线性增加。获得特性粘度与达西数函数的相关方程。研究发现，当悬浮液处于惯性流态时，其特性粘度随雷诺数线性增加，且增加速率取决于达西数。
We present three-dimensional lattice Boltzmann simulations of dilute suspensions containing porous particles. The fluid flow around and inside a porous particle is described by the volume-averaged macroscopic equations in terms of intrinsic phase average. The energy dissipation of the suspended particle in a Couette flow is calculated to obtain the relative viscosity of the suspension. Results show that the relative viscosity of the suspension increases linearly with the particle volume fraction. A correlation equation is obtained for the intrinsic viscosity as a function of Darcy number. It is found that when the suspension is at the inertial flow regime, its intrinsic viscosity increases linearly with Reynolds number, and the increasing rate depends on Darcy number.