Numerical Simulation of Free Surface Flow with an Elastic Plate Using a Cip-Based Model

Abstract

Free surface flow interaction with an elastic plate is simulated by a Constraint Interpolation Profile-based Model. A finite difference method (FDM) based on the CIP method is used for solving the flow field in a fixed staggered Cartesian grid and a finite element method (FEM) is used for dealing with the structural deformation. Beside, a volume of fluid type method, the THINC/SW (Tangent of Hyperbola for Interface Capturing with Slope Weighting) method is used to capture the free surface and a Ghost-Cell Immersed Boundary Method is adopted to couple the fluid and structure interaction. To verify the model, a rolling tank sloshing with a thin elastic plate is computed. Predicted results are found to be more agreement with the experimental results than reference data. Furthermore, two other benchmark experiments are tested, including an elastic gate deformation in dam break and a hanging elastic beam in a shallow oil sloshing. The computed results agree well with published literatures. It validates the reliability of the present solver to deal with nonlinear fluid-structure interactions.