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An immersed boundary method for fluid--structure interaction and acoustic modelling
li wang

Last modified: 2018-05-16

Abstract


This paper presents a two-dimensional immersed boundary method for fluid-structure interactions and acoustic modelling involving moving boundaries. In this method, a fifth-order accuracy Weighted Essentially Non-Oscillation (WENO) scheme is used to discretize the compressible multiphase Navier--Stokes equations. A finite element method based on the absolute nodal coordinate formulation (ANCF) is adopted to solve the non-linear flexible structure immersed in the fluid. By using a penalty immersed boundary, the no-slip boundary between the fluid and the structure is achieved. After the establishment of the numerical method, several validations (including sound generation by a circular cylinder in a uniform flow, acoustic wave scattered bench-mark problem and sound generation by a flapping foil) and comparisons with data from the references are presented subsequently to demonstrate the good performance of the present method in modelling sound generation due to fluid--structure interactions.

Keywords


Fluid--structure interaction; immersed-boundary method; large deformation; acoustic

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