Abstract
Investigation of sand ripple forming process on a seabed of inshore area is indispensable to understand the structure of the boundary layer. In addition, the shape of the sand ripple is of significant concern as the roughness of the seabed when the coastal morphodynamics is discussed. However the mechanism of the ripple formation is still not fully revealed. This will be due to the quite difficulty in implementation of measurement or simulation under complex boundary condition by the wave breaking. In this study, the ripple formation process is reproduced by coupling of enhanced MPS method, which is superior to simulate violent free surface flow, and DEM method, which has a distinct advantage of tracking movable bed. Furthermore, the ripple formation process is discussed in terms of the effect of pore flow.
