ABSTRACT
Numerical modeling of antidune formation and propagation is described. The numerical model is based on the 2D width-averaged Navier-Stokes equations, solved with a finite volume method using the k-epsilon turbulence model. The sediments are computed with the Engelund-Hansen formula and the convection-diffusion equation for suspended sediments. A non-orthogonal grid follows the moving bed and water surface. The results from the numerical model are compared with two physical model studies of downstream migrating antidunes. The computed dune lengths correspond reasonably well with the laboratory measurements.
