High fidelity fluid-structure interaction by radial basis functions mesh adaption of moving walls: A workflow applied to an aortic valve
| Autor: | Ubaldo Cella, Leonardo Geronzi, Marco Evangelos Biancolini, Simona Celi, Emanuele Gasparotti, Katia Capellini, Andrea Chiappa, Corrado Groth, Stefano Porziani |
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| Rok vydání: | 2021 |
| Předmět: |
J.3
Polymeric aortic valve General Computer Science Computer science 02 engineering and technology Computational fluid dynamics 01 natural sciences 010305 fluids & plasmas Theoretical Computer Science Computational science Radial basis functions Fluid-structure interaction 0103 physical sciences Fluid–structure interaction 0202 electrical engineering electronic engineering information engineering Meshfree methods Mathematics - Numerical Analysis ComputingMethodologies_COMPUTERGRAPHICS Morphing Settore ING-IND/14 business.industry Physics - Fluid Dynamics Solver Grid Finite element method Modeling and Simulation Multi-physics 020201 artificial intelligence & image processing business Interpolation |
| Zdroj: | Journal of Computational Science |
| ISSN: | 1877-7503 |
| DOI: | 10.1016/j.jocs.2021.101327 |
| Popis: | Fluid-Structure Interaction (FSI) can be investigated by means of non-linear Finite Element Models (FEM), suitable to capture large deflections of structural parts interacting with fluids, and Computational Fluid Dynamics (CFD). High fidelity simulations are obtained using the fine spatial resolution of both the structural and fluid computational grids. A key enabler to have a proper exchange of information between the structural solver and the fluid one is the management of the interface at wetted surfaces where the grids are usually non matching. A class of applications, known also as one-way FSI problems, involves a complex movement of the walls that is known in advance as measured or as computed by FEM, and that has to be imposed at the boundaries during a transient CFD solution. Effective methods for the time marching adaption of the whole computational grid of the CFD model according to the evolving shape of its boundaries are required. A very well established approach consists of a continuum update of the mesh that is regenerated by adding and removing cells to fit the evolution of the moving walls. In this paper, an innovative method based on Radial Basis Functions (RBF) mesh morphing is proposed, allowing the retention of the same mesh topology suitable for a continuum update of the shape. The proposed method is exact at a set of given key configurations and relies on shape blending time interpolation between key frames. The study of the complex motion of a Polymeric-Prosthetic Heart Valve (P-PHV) is presented using the new framework and considering as a reference the established approach based on remeshing. Comment: Article of 21 pages |
| Databáze: | OpenAIRE |
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