(380e) The Steric Effect of a Solid Boundary on the Orientation Distribution of a Dilute Suspension of Rigid Rod-like Particles Under Shear Flow

We performed numerical analysis to study the orientation distribution of thin rigid rod-like particles under shearing flow near a solid boundary. The focus of this study is the effect of excluded volume effect under various flow conditions. More specifically, the channel height is assumed to be larger than a rod length where the center-of-mass position of a rod from a wall is changed after each collision. Therefore, we classified the rod collision events according to the shear and the Brownian contributions to obtain the rod distribution correctly. Comapring with similar previous studies, which only considered 2D rotation and additional explicit parameter for the rod collision events, our approach is improved by considering the rod rotation in 3D without any adjustable parameters. The results, which will be presented, are the orientation distributions in terms of various angles, average orientation moments, and Jeffery orbit constants. We will also discuss the relation between our results and the average diffusivity, the center-of-mass distributions of rods in a bounded shear flow, and application to shape-based particle separations.