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Advanced Methods for Turbulent Flows and Fluid-Structure(-Contact) Interaction
Wolfgang Wall, Technical University of Munich Chair: Ching-Yao Chen Time: 2019/12/19 13:20-14:00 (102, 1F, TICC) |
Wolfgang A. Wall, Christoph Ager, Niklas Fehn, Martin Kronbichler
Institute for Computational Mechanics, Technical University of Munich, Germany
In this presentation we will present recent important advances in two quite challenging problem classes in Computational Mechanics – the efficient simulation of turbulent flows and fluid-structure interaction. In the latter we will put a special focus on so far not adequately treated situations that even involve contact of wet surfaces of solid domains.
In the field of incompressible turbulent flows one of the main challenges is to develop approaches that are able to reliably provide accurate solutions in a reasonable amount of time for general problem setups. We will present our approach developed in the last couple of years along with its’ most recent advances. After presenting the numerical approach we will also share insight into important implementation aspects that are crucial for highest parallel efficiency and also show the benefits of a recently developed hybrid multigrid algorithm.
Fluid-structure interaction problems involving large deformations in complex domains might best be solved with fixed grid approaches, like cut element based approaches. This is especially true when one even has to deal with topological changes of the fluid domain like for example in scenarios that involve contact of the wet solid bodies. After a brief introduction into our versatile CutFEM approach we will show different approaches that deal with such complex contact scenarios in a consistent and elegant way. The choice of a specific approach is then dependent on the quantity of interest, i.e. for example related to the question whether leakage of flow in valves need to be taken into account or whether one is just interested in the overall fluid-structure-contact interaction dynamics.
· Fehn N., Wall W.A., Kronbichler M.: A matrix-free high-order discontinuous Galerkin compressible Navier-Stokes solver: A performance comparison of compressible and incompressible formulations for turbulent incompressible flows. International Journal for Numerical Methods in Fluids, 89 (2019), 71-102
· Fehn N., Wall W.A., Kronbichler M.: Robust and efficient discontinuous Galerkin methods for under-resolved turbulent incompressible flows. Journal of Computational Physics, 372 (2018), 667-693
· Fehn N., Wall W.A., Kronbichler M.: Efficiency of high-performance discontinuous Galerkin spectral element methods for under-resolved turbulent incompressible flows. International Journal for Numerical Methods in Fluids, 88 (2018), 32-54
· Fehn N., Munch P., Wall W.A., Kronbichler M.: Hybrid multigrid methods for high-order discontinuous Galerkin discretizations. Journal of Computational Physics, submitted 2019
· Ager C., Seitz A., Wall W.A.: A consistent and comprehensive computational approach for general Fluid-Structure-Contact Interaction problems. International Journal for Numerical Methods in Engineering, submitted 2019
· Ager C., Schott B., Vuong A.-T., Popp A., Wall W.A.: A consistent approach for fluid-structure-contact interaction based on a porous flow model for rough surface contact. International Journal for Numerical Methods in Engineering, 119 (2019), 1345-1378
· Ager C., Schott B., Winter M., Wall W.A.: A Nitsche-based cut finite element method for the coupling of incompressible fluid flow with poroelasticity. Computer Methods in Applied Mechanics and Engineering, 351 (2019), 253-280
· Schott B., Ager C., Wall W.A.: Monolithic cut finite element based approaches for fluid-structure interaction. International Journal for Numerical Methods in Engineering, accepted 2018
Institute for Computational Mechanics, Technical University of Munich, Germany
In this presentation we will present recent important advances in two quite challenging problem classes in Computational Mechanics – the efficient simulation of turbulent flows and fluid-structure interaction. In the latter we will put a special focus on so far not adequately treated situations that even involve contact of wet surfaces of solid domains.
In the field of incompressible turbulent flows one of the main challenges is to develop approaches that are able to reliably provide accurate solutions in a reasonable amount of time for general problem setups. We will present our approach developed in the last couple of years along with its’ most recent advances. After presenting the numerical approach we will also share insight into important implementation aspects that are crucial for highest parallel efficiency and also show the benefits of a recently developed hybrid multigrid algorithm.
Fluid-structure interaction problems involving large deformations in complex domains might best be solved with fixed grid approaches, like cut element based approaches. This is especially true when one even has to deal with topological changes of the fluid domain like for example in scenarios that involve contact of the wet solid bodies. After a brief introduction into our versatile CutFEM approach we will show different approaches that deal with such complex contact scenarios in a consistent and elegant way. The choice of a specific approach is then dependent on the quantity of interest, i.e. for example related to the question whether leakage of flow in valves need to be taken into account or whether one is just interested in the overall fluid-structure-contact interaction dynamics.
· Fehn N., Wall W.A., Kronbichler M.: A matrix-free high-order discontinuous Galerkin compressible Navier-Stokes solver: A performance comparison of compressible and incompressible formulations for turbulent incompressible flows. International Journal for Numerical Methods in Fluids, 89 (2019), 71-102
· Fehn N., Wall W.A., Kronbichler M.: Robust and efficient discontinuous Galerkin methods for under-resolved turbulent incompressible flows. Journal of Computational Physics, 372 (2018), 667-693
· Fehn N., Wall W.A., Kronbichler M.: Efficiency of high-performance discontinuous Galerkin spectral element methods for under-resolved turbulent incompressible flows. International Journal for Numerical Methods in Fluids, 88 (2018), 32-54
· Fehn N., Munch P., Wall W.A., Kronbichler M.: Hybrid multigrid methods for high-order discontinuous Galerkin discretizations. Journal of Computational Physics, submitted 2019
· Ager C., Seitz A., Wall W.A.: A consistent and comprehensive computational approach for general Fluid-Structure-Contact Interaction problems. International Journal for Numerical Methods in Engineering, submitted 2019
· Ager C., Schott B., Vuong A.-T., Popp A., Wall W.A.: A consistent approach for fluid-structure-contact interaction based on a porous flow model for rough surface contact. International Journal for Numerical Methods in Engineering, 119 (2019), 1345-1378
· Ager C., Schott B., Winter M., Wall W.A.: A Nitsche-based cut finite element method for the coupling of incompressible fluid flow with poroelasticity. Computer Methods in Applied Mechanics and Engineering, 351 (2019), 253-280
· Schott B., Ager C., Wall W.A.: Monolithic cut finite element based approaches for fluid-structure interaction. International Journal for Numerical Methods in Engineering, accepted 2018
