To successfully design recreational hydraulics at in-stream structures, it is critical to model the flow patterns and structure of the resulting hydraulic jump. Since most types of hydraulics jumps include an aerated recirculation region, or roller, it is important to accurately capture the air-water interface, so that aeration is explicitly represented. For numerical simulation of two phase flows, the volume of fluid (VOF) method is most common, but results in a smearing of the water surface. To address this several different numerical schemes have been developed to improve surface resolution. In the popular open source CFD code OpenFOAM, MULES has been the standard interface scheme for the two-phase solver interFoam, but several years ago a new scheme was developed called isoAdvector that improves surface sharpness by computing the isosurface of the fluid surface within each cell. This work examines the simulated water surface profile for a hydraulic jump where the effects of mesh resolution and simulation runtime are analyzed for the two different surface tracking schemes. As the mesh resolution was decreased, the water surface profile converged to a common mesh independent profile, but compared to MULES, the isoAdvector scheme was able to produce a more accurate profile for the same cell size.
