Author(s): Maria Tsakiri; Panayotis Prinos
Linked Author(s): Panagiotis Prinos
Keywords: Reynolds stress model; Reynolds stresses; Turbulence; Swash flow; Bore
Abstract: Swash flow on impermeable, rough beach slope, produced by bore collapse is investigated numerically. Two different turbulence models together with the unsteady RANS equations have been used for the simulation. The Re-Normalisation Group (RNG) k-εturbulence model and the Reynolds Stress turbulence model (RSM) have been used in order to estimate the effect of turbulence modelling on the swash flow. The Volume of Fluid (VOF) method is also enabled in order to"track"the free surface and the head of the"current"as it travels along the rough slope. Computed flow depths, depth-averaged velocities, bed shear stresses, mean velocity profiles as well as turbulent kinetic energy profiles and Reynolds stresses are presented at six measurement locations. The numerical results of both models have no significant differences and thus the effect of normal stresses is not of great importance. Moreover they are in good agreement with experimental data presented by Kikkert et al., 2012.
Year: 2014