“…This commercial software package is well validated and has a wide area of application. Examples of successful usage of this 3D-numerical code are the optimisation of turbine [35][36][37], intake structures [38,39], spillways [40], water-jet turbines [41], surge tank throttles [42], swirl generating devices [43] and also heat flux in photovoltaic system [44]. Key reasons for this decision are the adaptable post-processing as well as the very flexible meshing, which allows to include all needed details of the geometry in the spatial discretization.…”