Session Details
MS06-2: Computational FSI and Aero-elasticity (Ganzes Minisymposium anzeigen)
Wednesday, 11. October 2017; 16:00 - 18:00 Uhr in Raum 7.04
Sitzungsleitung: Andreas Apostolatos
16:00
A Partitioned Approach for Fluid-Structure Interaction using NURBS-Enhanced Finite Elements and Isogeometric Analysis (Keynote)
Norbert Hosters (RWTH Aachen University), Michel Make (RWTH Aachen University), Stefanie Elgeti (RWTH Aachen University), Marek Behr (RWTH Aachen University)
Kurzfassung:
In the presented work the Deforming Spatial Domain/Stabilized Space-Time method extended with NEFEM is coupled with a semi-discrete IGA solver. IGA exploits the geometric properties of NURBS for numerical analysis. However, parametrizing the 3D-domains typically needed for fluid dynamics is still challenging. Instead, NEFEM suggests the use of standard finite elements in the interior domain and special elements along the boundaries. A simplified data transfer and an error reduction is achieved.
A Partitioned Approach for Fluid-Structure Interaction using NURBS-Enhanced Finite Elements and Isogeometric Analysis (Keynote)
Norbert Hosters (RWTH Aachen University), Michel Make (RWTH Aachen University), Stefanie Elgeti (RWTH Aachen University), Marek Behr (RWTH Aachen University)
Kurzfassung:
In the presented work the Deforming Spatial Domain/Stabilized Space-Time method extended with NEFEM is coupled with a semi-discrete IGA solver. IGA exploits the geometric properties of NURBS for numerical analysis. However, parametrizing the 3D-domains typically needed for fluid dynamics is still challenging. Instead, NEFEM suggests the use of standard finite elements in the interior domain and special elements along the boundaries. A simplified data transfer and an error reduction is achieved.
16:40
An isogeometric mortar surface coupling method for trimmmed multipatch CAD geometries with application to FSI
Andreas Apostolatos (Technical University of Munich), Altug Emiroglu (Technical University of Munich), Fabien Pean (ETH Zürich), Roland Wüchner (Technical University of Munich), Kai-Uwe Bletzinger (Technical University of Munich)
Kurzfassung:
In this work the isogeometric analysis concept is extended to the mortar-based method for coupling of non-matching discretizations at common interfaces with application to FSI. In particular, focus is put on transferring data between real world engineering geometries modeled in CAD and low order surface discretizations. Moreover, the continuity enforcement between the trimmed multipatches is discussed.
An isogeometric mortar surface coupling method for trimmmed multipatch CAD geometries with application to FSI
Andreas Apostolatos (Technical University of Munich), Altug Emiroglu (Technical University of Munich), Fabien Pean (ETH Zürich), Roland Wüchner (Technical University of Munich), Kai-Uwe Bletzinger (Technical University of Munich)
Kurzfassung:
In this work the isogeometric analysis concept is extended to the mortar-based method for coupling of non-matching discretizations at common interfaces with application to FSI. In particular, focus is put on transferring data between real world engineering geometries modeled in CAD and low order surface discretizations. Moreover, the continuity enforcement between the trimmed multipatches is discussed.
17:00
Deforming-Domain Problems Related to Packaging Machines: Mesh-Update Method and Flow Simulation
Fabian Key (RWTH Aachen University), Stefanie Elgeti (RWTH Aachen University)
Kurzfassung:
We will present an efficient and accurate interface-tracking method that describes computational domains composed of a fixed and a moving component in relative translational motion. The periodic character of the motion is reflected in the method via a closed virtual ring. We will conclude with validation results as well as a simulation of the flow and temperature field inside a generic geometry of a packaging machine.
Deforming-Domain Problems Related to Packaging Machines: Mesh-Update Method and Flow Simulation
Fabian Key (RWTH Aachen University), Stefanie Elgeti (RWTH Aachen University)
Kurzfassung:
We will present an efficient and accurate interface-tracking method that describes computational domains composed of a fixed and a moving component in relative translational motion. The periodic character of the motion is reflected in the method via a closed virtual ring. We will conclude with validation results as well as a simulation of the flow and temperature field inside a generic geometry of a packaging machine.
17:20
Hybrid Additive/Multiplicative Schwarz Preconditioning for Monolithic Solvers for Surface-Coupled Multi-Physics Problems
Maximilian Noll (Technical University of Munich), Matthias Mayr (Sandia National Laboratories), Michael W. Gee (Technical University of Munich)
Kurzfassung:
We propose a hybrid additive/multiplicative Schwarz preconditioner for the monolithic solution of surface-coupled problems. Existing physics-based block preconditioners have proven to be very powerful but accumulate the error at the coupling surface. We address this issue by combining them with an additional additive Schwarz preconditioner, whose subdomains span across the interface on purpose. By performing cheap but accurate subdomain solves this error accumulation can be reduced efficiently.
Hybrid Additive/Multiplicative Schwarz Preconditioning for Monolithic Solvers for Surface-Coupled Multi-Physics Problems
Maximilian Noll (Technical University of Munich), Matthias Mayr (Sandia National Laboratories), Michael W. Gee (Technical University of Munich)
Kurzfassung:
We propose a hybrid additive/multiplicative Schwarz preconditioner for the monolithic solution of surface-coupled problems. Existing physics-based block preconditioners have proven to be very powerful but accumulate the error at the coupling surface. We address this issue by combining them with an additional additive Schwarz preconditioner, whose subdomains span across the interface on purpose. By performing cheap but accurate subdomain solves this error accumulation can be reduced efficiently.