Simulating (electro) hydrodynamic effects in colloidal dispersions: Smoothed profile method
Simulating (electro) hydrodynamic effects in colloidal dispersions: Smoothed profile method
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DOI：
10.1140/epje/i2007-10332-y
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发表时间：
2008-08-01
影响因子：
1.8
通讯作者：
Yamamoto, R.
中科院分区：
文献类型：
--
作者：
Nakayama, Y.;Kim, K.;Yamamoto, R.
以前，我们已经提出了一个直接模拟方案的胶体分散在牛顿溶剂（物理评论E 71，036707（2005））。本文提出了一种称为“平滑剖面法”的改进公式，其中同时对基质流体和胶体进行时间推进。SP法是一种直接数值模拟颗粒流的方法，通过对胶体颗粒的光滑轮廓的利用，提供了连续流体动力学和刚体动力学之间的耦合方案。此外，改进的配方包括一个扩展，将多组分流体，允许系统，如带电胶体在电解质溶液进行研究。的胶体分散体的动力学解决了相同的计算成本所需的解决非颗粒流。数值结果评估胶体分散体的流体动力学相互作用的验证SP方法。SP方法不限于特定的本构模型的主机流体，因此可以应用于复杂流体中的胶体分散体。
Previously, we have proposed a direct simulation scheme for colloidal dispersions in a Newtonian solvent (Phys. Rev. E 71, 036707 (2005)). An improved formulation called the "Smoothed profile (SP) method" is presented here in which simultaneous time-marching is used for the host fluid and colloids. The SP method is a direct numerical simulation of particulate flows and provides a coupling scheme between the continuum fluid dynamics and rigid-body dynamics through utilization of a smoothed profile for the colloidal particles. Moreover, the improved formulation includes an extension to incorporate multicomponent fluids, allowing systems such as charged colloids in electrolyte solutions to be studied. The dynamics of the colloidal dispersions are solved with the same computational cost as required for solving non-particulate flows. Numerical results which assess the hydrodynamic interactions of colloidal dispersions are presented to validate the SP method. The SP method is not restricted to particular constitutive models of the host fluids and can hence be applied to colloidal dispersions in complex fluids.