Numerical simulation of plunging wave breaker impact by a modified Turbulent WCSPH method

作者：Varnousfaaderani M Rostami; Ketabdari M J^*

来源：Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2015, 37(2): 507-523.

DOI：10.1007/s40430-014-0201-8

• Weakly compressible SPH
• Sub-particle scale (SPS)
• Modification of kernel and gradient of kernel
• Plunging wave breaking impact

In this paper, the mesh-less weakly compressible smoothed particle hydrodynamics (WCSPH) method was used to solve the continuity and momentum equations with laminar viscosity and SPS turbulent model. To correct the pressure field and improve the accuracy of the free surface profile, modification of kernel and gradient of kernel was implemented to WCSPH model. The modified method, namely mSPH-T-K, was also equipped with periodic smoothing of the density using the modified kernel. To validate the modified model, the pressure field and wave front position of the 2D dam break flow were compared with those of experimental data, standard SPH method and mSPH-T method, which is the turbulence SPH method without modification of kernel and its gradients. Furthermore, the dam break on a wet bed was performed by the model. The results showed the well agreement of the modified model results of free surface with this benchmark. Finally, transformation of plunging breaker wave on a ramp was modeled with both mSPH-T and modified model. The results showed that the modified model has a good agreement with experimental data.

• 出版日期2015-3