Abstract: The Lagrangian second-moment method is used to compute the dye-concentration distribution in turbulent recirculating flow generated in a shallow open channel by a sudden widening of flow in the transverse direction. The ...

Abstract: The recirculating flow produced by a sudden widening of flow in a shallow open channel is computed using three turbulence models including (1) a constant-eddy-viscosity model; (2) a depth-averaged