要約

This paper describes: (1) a wall function for arbitrary surface roughness, with parameters determined as functions of roughness by imposing high-order consistency with the log law; (2) implementation of sediment morphodynamics in a 3-d RANS solver, with modifications for large slopes and arbitrary bed orientation. The wall function is validated for 2-equation and differential-stress closures in rough-wall pipe flow. Simulations of scour and deposition in a channel bend and of the evolution of sand mounds are described.