Large-Eddy Simulation of a Classical Hydraulic Jump: Influence of Modelling Parameters on the Predictive Accuracy

Results from large-eddy simulations of a classical hydraulic jump at inlet Froude number two are reported. The computations were performed using the general-purpose finite-volume-based code OpenFOAM®, and primary goal was to evaluate influence modelling parameters on predictive accuracy, as well establish associated best-practice guidelines. A benchmark simulation conducted grid with 1 mm-cell-edge length validate solver provide reference solution for parameter study. remaining covered different selections parameters: geometric vs. algebraic interface capturing, three mesh resolution levels, four choices convective flux interpolation scheme. Geometric capturing led better but deteriorated numerical stability increased times. Interestingly, dissipation shown systematically improve results, both in terms accuracy stability. Strong sensitivity observed directly downstream toe jump.