MPS法高次Laplacianモデルの改良と鉛直噴流による洗掘過程の数値解析

抄録

A rubble mound or subjacent sand ground of a composite breakwater can be scoured by a tsunami overtopping. Hence, it is indispensable to examine a scouring due to overtopping water for making a damage prediction of composite breakwater. Although a particle method is suitable for simulating this scouring process, small conductivity in a sand layer at sea bottom can bring a numerical instability in an interaction term between fluid and sand. Therefore, in this study, the higher order Laplacian model has been improved for a more stable calculation, and the applicability of the model is examined through a numerical test on scouring process due to submerged impinging jet.