Turbulence models evaluation in MPS Lagrangian simulation of marine waters
2022
Imanian, Hanifeh | Kolahdoozan, Morteza | Zarrati, Amir Reza
An advanced and well-equipped Moving Particle Semi-implicit which is a Lagrangian method is employed to simulate hydrodynamic behaviour of water wave evolution. Unlike most recently developed MPS models that consider inviscid or laminar flow, the present developed model is based on the turbulent nature of the fluid flow. In order to consider the turbulence stresses, three turbulence closures are included in the model, which are constant eddy viscosity, mixing length and k-ε model. The developed model was applied to different case studies including wave run-up on an inclined wall, wave train induced by wavemaker and landslide-generated wave. The model results were compared with analytical, empirical and experimental data cited in the literature and a good agreement was found. The results also showed that deploying a turbulence model could improve the stability of the MPS model. Results obtained through this research reveal that the application of k-ε model in combination with MPS method produces accurate and reliable results in addition to a stable solution for free surface prediction in wave mechanics.
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