Author(s): H. M. Hu
Linked Author(s):
Keywords: RNS equations; Hybrid finite-analytic method; Three-dimensional flow; Scouring funnel flow; SIMPLER procedure; Sediment transport; Free surface
Abstract: A three-dimensional (3D), time-dependent hydrodynamic model is developed in a vertically dilated coordinate system to simulate turbulent flow and sediment transport in a scouring funnel in front of an inlet hydraulic structure. This model solves Reynolds-averaged Navier-Stokes equations and sediment transport equation using the hybrid finite-analytic method (HFAM). The free surface elevation is traced by solving the depth-integrated continuity equation. The model is first applied to the case of a two-dimensional (2D) flow in front of a flume-wide sluice gate. The computed velocity vectors, the reattachment length and the profiles of suspended sediment concentration show good agreement with experimental data and other relevant numerical results. The model is further used to simulate the 3D flow in a reservoir with a three-dimensional bottom topography and a submerged 3D orifice. The computed 3D flow pattern is presented and discussed.
Year: 1999