In the paper we investigate scaling of parallel performance for an implementation of quasi-hydrodynamic (QHD) approach as an OpenFOAM solver. Time-dependent partial differential equations are discretized using Finite volume method (FVM). As a test hydrodynamical problem we take internal wave generation in a bounded tank of trapezoidal shape, and set of parameters, which allows internal wave attractors to evolve. Proper Orthogonal Decomposition was applied to analyze and compare 2D and full 3D simulations.