三次元流体・構造・地形変化連成数値計算モデルの開発と没水物体周辺の洗掘現象への適用

抄録

A three-dimensional coupled fluid-structure-sediment interaction model (FSSM) is developed in this study. FSSM consists of an extended Navier-Stokes solver (XNS) with a volume of fluid module (VOF) for air-water interface tracking, an immersed boundary module (IBM) for structure motion tracking, and a sediment transport module (STM) for sediment surface tracking and suspended sediment tracking. In FSSM, a two-way coupling procedure is implemented in each time step to connect XNS with VOF, IBM, and STM. FSSM is applied to wave-induced local scour around a submerged movable short cylinder and resulting burial of the cylinder. The computational capability of FSSM is demonstrated against experimental data in terms of seabed change around the cylinder.