This paper provides an overview of the computational techniques and parallelization strategies employed within the FLOW-3D software for simulating hydrodynamic processes in complex environments. The study contrasts the outcomes of numerical simulations obtained via FLOW-3D and a 3D wave hydrodynamics model. The wave motion characteristics in the presence of four supports and the forces exerted on these supports were analyzed. The parallelization techniques in FLOW-3D, including spatial and temporal parallelization, as well as a hybrid approach, enable the efficient utilization of computing resources across multiple cores or network nodes. The numerical simulations highlight the effectiveness of the proposed algorithms, particularly in cases involving dynamically evolving free surfaces, underscoring the practical value of FLOW-3D for tackling complex hydrodynamic challenges.