Author(s): Tatsuhiko Uchida; Shoji Fukuoka
Linked Author(s): Shoji Fukuoka, Tatsuhiko Uchida
Keywords: Submersible large roughness element; Drag force; Two-dimensional analysis; Urban district inundation
Abstract: In our previous study, we developed a numerical analysis method of flow with non-submersible large roughness elements in group. However, the study on the flow with submersible large roughness elements has not been made enough. The purpose of this paper is to develop a two-dimensional model for shallow water flow with submersible large roughness elements. For this analysis, it is necessary to estimate drag force of roughness elements. Drag forces acting on the submersible elements are measured for various roughness arrangements and water depth. Then, a numerical model is developed through addition of resistance terms due to roughness elements in the two-dimensional shallow water equations using the general curvilinear coordinate system. The applicability of this model is verified by experiments. Additionally, the model is applied to the simulation of flow flooding in an urban district having submersible and non-submersible houses.
Year: 2001