This case is a 2D width-averaged simulation of a turbidity current located inside a flume, replicating the experiments of Sequeiros et al. (2018) and Sequeiros et al (2010). A time-dependent solution was used for the Navier-Stokes equations and the convection-diffusion equation for the sediment concentration.
The figures below are from initial runs where the upstream boundary condition was not correct.
Two grids were used: A coarse and a fine. The grid figures below is from the coarse grid. The figures without grid lines are with the fine grid. The fine grid had 4500x500 cells in the horizontal and lateral direction, respectively.
Longitudinal profile showing sediment concentrations and the head of the turbidity current.
Detail of downstream part of the grid.
Sediment concentrations and velocity vectors at the head of the turbidity current.
Sediment concentrations after the head has reached the downstream end of the flume.
Velocities and sediment concentrations after 220 seconds.
Velocities and sediment concentrations after 380 seconds.
Detail of velocity vectors and sediment concentrations after 220 seconds.
Video of longitdunal profile of the whole flume.
Video of a detail of the longitdunal profile.
Video of longitudinal profile of the flume, default turbulence damping.
Video of longitudinal profile of the flume, stronger turbulence damping.
Video of upstream end, showing ripple formation.
Sequeiros, O. E., Mosqueroa, R., Pedocchi, F., 2018, Internal structure of a self-accelerating turbidity current, Journal of Geophysical Research, Oceans, doi:10.1029/2018JC14061.
Sequeiros, O. E., Spinewine, B., Beaubouef, R. T., Sun, T., Garcia, M. H., 2010, Characteristics of Velocity and Excess Density Profiles of Saline Underflows and Turbidity Currents Flowing over a Mobile Bed, Journal of Hydraulic Engineering, doi:10.1061(ASCE)HY.1943-7900.0000200
This page was last updated 7. August 2023.