  Results from large-eddy simulations of a classical hydraulic jump at inlet
Froude number 2 are reported. The computations are performed using the
general-purpose finite-volume based code OpenFOAM, and the primary goal is to
evaluate the influence of modelling parameters on the predictive accuracy, as
well as establish associated best-practice guidelines. A benchmark simulation
on a dense computational mesh is conducted, and good agreement with existing
reference data is found. The remaining simulations cover different selections
of modelling parameters: geometric vs algebraic interface capturing, three mesh
resolution levels, four choices of the convective flux interpolation scheme.
Geometric interface capturing leads to better accuracy but deteriorated
numerical stability and increased simulation times. Interestingly, numerical
dissipation is shown to systematically improve the results, both in terms of
accuracy and stability. The densest of the three grids, which is twice as
coarse as the grid used in the benchmark simulation, was found to be sufficient
for faithfully reproducing all the considered quantities of interest. The
recommendation is therefore to use this grid, geometric interface capturing,
and a second-order upwind scheme for the convective fluxes.
