Scour modeling based on immersed boundary method: A pathway to practical use of three-dimensional scour models

Local scour around structures is an important hydraulic phenomenon that involves multiple coupled physical processes, including turbulent flow, sediment transport, and the evolution of erodible bed. This paper presents a new three-dimensional (3D) model, ibScourFoam, which based on immersed boundary method. model capable dealing with complex thus it paves way for practical use 3D models. A special wall function has been developed to overcome non-smoothness problem shear stress in previous methods. Smooth accurate critical importance successful simulation scour. The was validated against cases reported literature one flume experiment conducted this work. validation case flow vertical pile reproduced well by our model. partially-buried, horizontal cylinder placed foundation. finite length initiated contraction. revealed distinct stages experiment. process undermining exposure initially buried foundation captured