Collective behavior of boundary-aligning mutually-repelling self-propelling particles

Inspired by the group behavior of larval zebrafish in dishes, we introduce a new model for self-propelling particles in circular confinements. The swimmers mutually repel if in each-other's proximity, but they align with the confining boundaries. We present simulations of the collective motion of such particles for different drop sizes and particle densities when the initial distribution is uniform and isotropic. Last, we show phase diagrams based on the magnitudes of wall aligning and particle repulsion for varying swimmer densities and domain sizes.