Fast fluid–structure interaction simulations using a displacement-based finite element model equipped with an explicit streamline integration prediction

We propose here a displacement-based updated Lagrangian fluid model developed to facilitate a monolithic coupling with a wide range of structural elements described in terms of displacements. The novelty of the model consists in the use of the explicit streamline integration for predicting the end-o...

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Veröffentlicht in:Computer methods in applied mechanics and engineering Jg. 315; S. 1080 - 1097
Hauptverfasser: Ryzhakov, P.B., Marti, J., Idelsohn, S.R., Oñate, E.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Amsterdam Elsevier B.V 01.03.2017
Elsevier BV
Schlagworte:
Computer simulation
Computing time
Constrictions
Coupled problems
Displacement
Finite element method
Fluid-structure interaction
Incompressible flows
Lagrangian
Mathematical models
Navier–Stokes
Particle finite element method
Predictions
Structural members
Navier–Stokes
Fluid–structure interaction
Lagrangian
Incompressible flows
Coupled problems
Particle finite element method
ISSN:0045-7825, 1879-2138
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Zusammenfassung:We propose here a displacement-based updated Lagrangian fluid model developed to facilitate a monolithic coupling with a wide range of structural elements described in terms of displacements. The novelty of the model consists in the use of the explicit streamline integration for predicting the end-of-step configuration of the fluid domain. It is shown that this prediction considerably alleviates the time step size restrictions faced by the former Lagrangian models due to the possibility of an element inversion within one time step. The method is validated and compared with conventional approaches using three numerical examples. Time step size and corresponding Courant numbers leading to optimal behavior in terms of computational efficiency are identified. •Efficient displacement-based model for solving fluid–structure interaction problems.•Combination of explicit prediction of the nodal positions using integration along the streamlines with an implicit correction.•Large time steps.•Tightly coupled scheme.
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ISSN:0045-7825
1879-2138
DOI:10.1016/j.cma.2016.12.003