DEVELOPMENT OF MULTI-RESOLUTION SPH METHOD AND ITS VALIDATION

Abstract

 Multi-resolution technique has been implemented to the SPH method to reduce high computational costs in standard SPH with uniform particle size. The multi-resolution model splits a coarse particle into two fine particles in a high-resolution area and merges adjacent two fine particles into a coarse particle outside of the area. To check the validitity and efficiency of the present model, a dam-break and wave overtopping problems were analyzed. The model reproduced the measured location of dam-break tip with reasonable accuracy. The model also agreed well with the high-resolution uniform model both in the dam-break and overtopping problems, however, slightly increasing pressure oscillation. In terms of efficiency, the computational cost was reduced by 40% compared to the high-resolution uniform model with the present configuration.