Cichocki Bogdan, Ekiel-Jeżewska Maria L, Wajnryb Eligiusz
Institute of Theoretical Physics, Faculty of Physics, University of Warsaw, Hoża 69, 00-681 Warsaw, Poland.
Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawińskiego 5B, 02-106 Warsaw, Poland.
J Chem Phys. 2014 Apr 28;140(16):164902. doi: 10.1063/1.4871498.
Systems of spherical particles moving in Stokes flow are studied for different particle internal structures and boundaries, including the Navier-slip model. It is shown that their hydrodynamic interactions are well described by treating them as solid spheres of smaller hydrodynamic radii, which can be determined from measured single-particle diffusion or intrinsic viscosity coefficients. Effective dynamics of suspensions made of such particles is quite accurately described by mobility coefficients of the solid particles with the hydrodynamic radii, averaged with the unchanged direct interactions between the particles.
针对不同的颗粒内部结构和边界，包括纳维滑移模型，研究了在斯托克斯流中运动的球形颗粒系统。结果表明，通过将它们视为具有较小流体动力学半径的固体球体，可以很好地描述它们的流体动力学相互作用，该流体动力学半径可由测量的单颗粒扩散或特性粘度系数确定。由这些颗粒制成的悬浮液的有效动力学可以通过具有流体动力学半径的固体颗粒的迁移率系数相当准确地描述，该迁移率系数是在颗粒之间直接相互作用不变的情况下进行平均得到的。
