Abstract
For ship and offshore applications, the fluid-floating object interaction is of particular importance and accurate numerical calculations are required. However, low-order accurate methods are not sufficient to have decent results even though they are computationally efficient. Therefore, high-resolution fluid-floating body coupling modeling is still needed in computational fluid dynamics (CFD) based solvers. In this study, the capability of a direct forcing immersed boundary approach to model a floating object in fluid domain is investigated. This method is implemented to be able to handle rigid-body motion within the high-resolution computational fluid dynamics (CFD) solver REEF3D::CFD which is used for numerical calculations. The validation study includes the heave motion tests of a three-dimensional buoy. Here, the free surface is calculated with the level set method, convection terms are discretized with fifth-order WENO schemes, and a third-order TVD Runge-Kutta scheme. The numerical results are compared with the available data in the literature.
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