This thesis aims to contribute to a better understanding of turbulent open channel flow
sediment erosion and sediment transport. The thesis provides an analysis of high-fidelity data
from direct numerical simulation of (i) open channel flow over an array of fixed spheres (ii)
open channel flow with mobile eroding spheres (iii) open channel flow with sediment transport
of many mobile spheres. An immersed boundary method is used to resolve the finite-size
particles.
