Numerical Method of Fluid-Structure Interaction for Bluff Body with a Flexible Splitter Plate Based on CBS and ANCF
The rigid bluff body with a flexible splitter plate is concerned,and a numerical approach for the simulation of the fluid-structure interaction is proposed,where the complex motion and deformation of rigid-flexible multi-bodies are accurately considered.From the view of an arbitrary Lagrangian-Eulerian scheme,the finite element method using characteristic-based split(CBS)is developed to solve the governing equation of fluid flow.Based on the absolute nodal coordinated formula(ANCF),the complex large-deformation characteristics of the splitter plate are accurately simulated.The sequential coupling method is used to achieve the correlation between the fluid and the structure,while the interpolation of the radial basis function is applied to ensure the quality of moving meshes.The reliability of the numerical method is validated in the numerical examples for flexible splitter plates behind a fixed square cylinder and an elastically mounted circular cylinder,respectively.The proposed method is applied to the two-dimensional flow-induced vibration of an elastically mounted rounded square cylinder with a flexible splitter plate,and fluid-structure interactions are discussed.
bluff body with flexible splitter platefluid-structure interactionnumerical simulationcharacteristic based splitabsolute nodal coordinated formula
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