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A computational method has been proposed to predict the interactions between free-surface flows and elastic bodies submerged in the flow. A solid model, whose deformations due to fluid forces are solved with a finite element method, is introduced into the MICS, which is a computational method for incompressible multiphase fields. A solid object submerged in the flow is divided into multiple tetrahedron elements, through which fluid-solid interactions are taken into account using a tetrahedron sub-cell method. The experiments on the wave flows acting on a partly submerged elastic plate were carried out in a laboratory flume in order to confirm the applicability of the proposed numerical method. The fluid forces acting on an elastic plate and its deformations were measured. The developed computational method was applied to the experimental results and the fluid forces and the deformations of the plate were compared with calculations. As a result, it was shown that the experimental results are adequately predicted with the present numerical method.

Numerical simulation of fluid forces acting on objects deformed in free surface flows