Advanced Radial Basis Functions Mesh Morphing for High Fidelity Fluid-Structure Interaction with Known Movement of the Walls: Simulation of an Aortic Valve
| Autor: | Katia Capellini, Andrea Chiappa, Corrado Groth, Simona Celi, Emanuele Gasparotti, Marco Evangelos Biancolini, Leonardo Geronzi, Ubaldo Cella, Stefano Porziani |
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| Rok vydání: | 2020 |
| Předmět: |
Morphing
020301 aerospace & aeronautics Fluid-Structure Interaction Polymeric aortic valve Settore ING-IND/14 Computer science business.industry RBF 02 engineering and technology Solver Computational fluid dynamics Grid Finite element method Computational science 020303 mechanical engineering & transports 0203 mechanical engineering Fluid–structure interaction FSI Multi-physics RBF Morph Aortic valve business ComputingMethodologies_COMPUTERGRAPHICS Interpolation |
| Zdroj: | Lecture Notes in Computer Science ISBN: 9783030504328 ICCS (6) |
| DOI: | 10.1007/978-3-030-50433-5_22 |
| Popis: | High fidelity Fluid-Structure Interaction (FSI) can be tackled by means of non-linear Finite Element Models (FEM) suitable to capture large deflections of structural parts interacting with fluids and by means of detailed Computational Fluid Dynamics (CFD). High fidelity is gained thanks to the spatial resolution of the computational grids and a key enabler to have a proper exchange of information between the structural solver and the fluid one is the management of the interfaces. A class of applications consists in problems where the complex movement of the walls is known in advance or can be computed by FEM and has to be transferred to the CFD solver. The aforementioned approach, known also as one-way FSI, requires effective methods for the time marching adaption of the computation grid of the CFD model. A versatile and well established approach consists in a continuum update of the mesh that is regenerated so to fit the evolution of the moving walls. In this study, an innovative method based on Radial Basis Functions (RBF) mesh morphing is proposed, allowing to keep the same mesh topology suitable for a continuum update of the shape. A set of key configurations are exactly guaranteed whilst time interpolation is adopted between frames. The new framework is detailed and then demonstrated, adopting as a reference the established approach based on remeshing, for the study of a Polymeric-Prosthetic Heart Valve (P-PHV). |
| Databáze: | OpenAIRE |
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