Large Eddy Simulation of a symmetric trapezoidal channel at a Reynolds number of 430,000

Abstract

This paper dcsribes a Large Eddy Simulation of steady uniform flow in a symmetric compound channel of trapezoidal cross-section with flood plains at a Reynolds number of 430.000. The simulation captures the complex interaction between the main channel and the flood plains and predicts the bed stress distribution, velocity distribution, and the secondary circulation across the floodplain. The results are compared with experimental data from the SERC Flood Channel Facility at Hydaulics Research Ltd, Wallingford, England.

Keywords:

• Turbulence
• LES
• compound channel