Suspension flow modeling for general geometries
Suspension flow modeling for general geometries
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一般几何形状的悬浮液流动建模
DOI：
10.1016/j.ces.2009.04.033
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发表时间：
2009
影响因子：
4.7
通讯作者：
J. Morris
中科院分区：
文献类型：
--
作者：
Ryan M. Miller;J. P. Singh;J. Morris
众所周知，浓悬浮液的流动伴随着不可逆的整体迁移。一种对颗粒相对于体运动的迁移进行建模的方法是基于由颗粒法向应力的空间变化引起的颗粒通量。混合应力的框架不变公式以一般形式给出并用于该方法中;考虑了应力本构模型的具体形式。这些形式要么只包括各向同性剪切引起的颗粒应力（颗粒压力），要么包括法向应力差和颗粒压力。预测的流动和迁移行为被认为是复杂的几何形状，作为主要的例子，使用在收缩和膨胀的流动。结果仅限于二维流动。
The flow of concentrated suspensions is well known to be accompanied by irreversible bulk migrations. One approach to modeling the migration of particles relative to the bulk motion is based on a particle flux induced by spatial variation of the particle normal stresses. A frame-invariant formulation of the mixture stresses is presented in a general form and used in this approach; specific forms of the constitutive model for the stress are considered. These forms either include only the isotropic shear-induced particle stress (particle pressure) or include both normal stress differences and the particle pressure. The predicted flow and migration behavior are considered for complex geometries, using the flows in a contraction and an expansion as the primary examples. Results are limited to two-dimensional flows.