A Numerical Study on Flow in Porous Structure using Non-Hydrostatic Model

摘要

This paper introduces a non-hydrostatic wave model SWASH for simulating wave interactions with porous structures.This model calculates the flow in porous media based on volume-averaged Reynolds-averaged Navier-Stokes equations (VARANS) in σ-coordinate.The empirical coefficients of resistance used to account for the flow in a porous media often need to be measured or calibrated.In this study,the empirical resistance coefficients used in the model are calibrated and validated using laboratory experiments,involving dam-break flow through porous media,and solitary wave interactions with a porous structure.It is shown that the agreement between experimental and numerical results is generally satisfactory.It is also confirmed that non-hydrodynamic model,SWASH,is computationally much more efficient than the three-dimensional porous flow models based on VOF approach.