A numerical framework for simulating fluid-structure interaction phenomena
In this paper, a numerical tool able to solve fluid-structure interaction problems is proposed. The lattice Boltzmann method is used to compute fluid dynamics, while the corotational finite element formulation together with the Time Discontinuous Galerkin method are adopted to predict structure dy...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Gruppo Italiano Frattura
2014-07-01
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| Series: | Fracture and Structural Integrity |
| Subjects: | |
| Online Access: | http://www.gruppofrattura.it/pdf/rivista/numero29/numero_29_art_30.pdf |
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| Summary: | In this paper, a numerical tool able to solve fluid-structure interaction problems is proposed. The
lattice Boltzmann method is used to compute fluid dynamics, while the corotational finite element formulation
together with the Time Discontinuous Galerkin method are adopted to predict structure dynamics. The
Immersed Boundary method is used to account for the presence of an immersed solid in the lattice fluid
background and to handle fluid-structure interface conditions, while a Volume-of-Fluid-based method is
adopted to take trace of the evolution of the free surface. These ingredients are combined through a partitioned
staggered explicit strategy, according to an efficient and accurate algorithm recently developed by the authors.
The effectiveness of the proposed methodology is tested against two different cases. The former investigates
the dam break phenomenon, involving the modeling of the free surface. The latter involves the vibration regime
experienced by two highly deformable flapping flags obstructing a flow. A wide numerical campaign is carried
out by computing the error in terms of interface energy artificially introduced at the fluid-solid interface.
Moreover, the structure behavior is dissected by simulating scenarios characterized by different values of the
Reynolds number. Present findings are compared to literature results, showing a very close agreement. |
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| ISSN: | 1971-8993 1971-8993 |