2007 年 54 巻 p. 821-825
In this paper, we present a new numerical wave flume model capable of handling interface problems with complex geometry on a standard regular Cartesian grid, using immersed boundary method. Force terms are incorporated to the momentum equations to represent the interface on a fixed Cartesian grid and they are calculated on a finite number of Lagrangian points distributed over structure-fluid interface. The wave field around a horizontal circular cylinder has been chosen in order to validate applicability of the proposed numerical wave tank model. The calculated wave forces acting on cylinder are compared with previous experimental and numerical results. Results show that the proposed model gives good agreement with experimental results.