INTER-COMPARISON OF CFD CODES USING DATA FROM A LARGE-SCALE PHYSICAL MODEL

摘要

There are a number of three-dimensional computational fluid dynamics codes which are currently in use for river engineering purposes. This paper presents a rigorous intercomparison of four of the available codes (PHOENICS, FLUENT, SSIIM and TELEMAC-3D) using data from the UK Flood Channel Facility Series B experiment for a two-stage meandering channel. The application of each code was carried out independently and this led to a series of different valid models in terms of the mesh used and the assumptions made. In all cases, grid convergence was demonstrated and conventional criteria, such as Y~+, were satisfied. Standardised methods were used to compare each model with the available data. Results are shown for the streamwise velocity, turbulent kinetic energy and bed shear stress. They demonstrate that the models produce similar results overall, although there are some differences in the predicted flow field and greater differences in turbulent kinetic energy and bed shear stress. This study is seen as an essential first step in the inter-comparison of available codes.