Idaho National Laboratory, Idaho Falls, ID 83415, USA.
J Colloid Interface Sci. 2011 Jan 1;353(1):46-51. doi: 10.1016/j.jcis.2010.09.021. Epub 2010 Sep 15.
We present a novel mesoscale simulation approach to modeling the evolution of solid particles segregated at fluid-fluid interfaces. The approach involves a diffuse-interface field description of each fluid phase in addition to the set of solid particles. The unique strength of the model is its generality to include particles of arbitrary shapes and orientations, as well as the ability to incorporate electrostatic particle interactions and external forces via a previous work [P.C. Millett, Y.U. Wang, Acta Mater. 57 (2009) 3101]. In this work, we verify that the model produces the correct capillary forces and contact angles by comparing with a well-defined analytical solution. In addition, simulation results of rotations of various-shaped particles at fluid-fluid interfaces, external force-induced capillary attraction/repulsion between particles, and spinodal decomposition arrest due to colloidal particle jamming at the interfaces are presented.
我们提出了一种新的介观模拟方法来模拟在流体-流体界面处分离的固体颗粒的演化。该方法涉及到每个流体相的弥散界面场描述，以及一组固体颗粒。该模型的独特优势在于它能够包括任意形状和取向的颗粒，并且能够通过之前的工作[P.C. Millett, Y.U. Wang, Acta Mater. 57 (2009) 3101]纳入静电颗粒相互作用和外力。在这项工作中，我们通过与一个明确定义的解析解进行比较，验证了该模型产生了正确的毛细力和接触角。此外，还展示了各种形状的颗粒在流体-流体界面处的旋转、颗粒间外力引起的毛细吸引/排斥以及胶体颗粒在界面处堵塞导致的旋节线分解停止的模拟结果。
