3.1. Setup
For these simulations, the characteristic length scale was chosen to be half the lock height. The lock was set atop an
initially flat ramp, and filled with 1% concentration monodisperse sediment. Thanks to the immersed boundary method
employed in TURBINS, shear stress at the fluid-sediment boundary could be accurately modeled, and even sub-grid
scale changes in the bottom geometry resulted in changes to the behavior of the flow. However, because TURBINS
does not dynamically update the bottom geometry during the simulation, we could only update it in between successive
flows. Additionally, in order to ensure that the total suspension mass released in each each flow was the same, we
cleared the lock of any sediment that may have deposited during the previous simulation