viscous fluid中球形颗粒的流体动力学半径近似：颗粒内部结构和边界的影响
Hydrodynamic radius approximation for spherical particles suspended in a viscous fluid: influence of particle internal structure and boundary
摘要：
本文研究了球形颗粒在Stokes流中运动的系统，考虑了不同的颗粒内部结构和边界条件，包括Navier滑移模型。结果表明，它们的流体动力学相互作用是很好地描述了通过处理它们作为固体球的较小的流体动力学半径，这可以确定从测量的单粒子扩散或特性粘度系数。由这样的颗粒制成的悬浮液的有效动力学是相当准确地描述了与流体动力学半径的固体颗粒的迁移率系数，平均与不变的直接粒子之间的相互作用。
英文摘要：
Systems of spherical particles moving in Stokes flow are studied for a different particle internal structure 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.
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