Numerical Modeling of B-Type Hydraulic Jump at an Abrupt Drop

The properties of a B-type hydraulic jump at an abrupt drop are analyzed experimentally and numerically for different flow cases. Using the Standard k-epsilon, Shear Stress Transport and Reynolds Stress turbulence closure models, the governing equations are solved numerically using ANSYS-Fluent program package which is based on the Finite Volume Method. The Volume of Fluid (VOF) method is used to determine the free surface profile. Grid independence study is carried out using a Grid Convergence Index (GCI) analysis. The numerical results for the free surface and velocity profiles of flow from the present turbulence models are compared with experimental data. Mean square errors and mean absolute relative errors of measured and predicted free surface profiles and velocity fields indicate that Reynolds Stress Model is a more successful turbulence closure model than the other two for the determination of surface profile and velocity field of the B-type hydraulic jump.