Author(s)

L. Qian, D. M. Causon, D. M. Ingram & C. G. Mingham

Abstract

A two-fluid solver for hydraulic applications including the prediction of violent overtopping of waves at seawalls has been developed. The scheme is based on the solution of the incompressible Navier-Stokes equations for a variable density fluid system using the artificial compressibility method. The computational domain encompasses both water and air regions and the interface between the two fluids is treated as a contact discontinuity in the density field which is captured automatically as part of the solution. A time-accurate solution has been achieved by using an implicit dual-time iteration technique. Several classical test cases including the low amplitude sloshing tank and the broken dam problems, as well as a collapsing water column hitting a downstream obstacle have been calculated using the present approach and the results compare very well with other theoretical and experimental results.

Keywords