SSD - Hosters Seminar
Location: AICES Seminar Room 115, 1st floor, Schinkelstr. 2, 52062 Aachen
Dr. Norbert Hosters - Spline-based Methods for Fluid-structure Interaction
Chair for Computational Analysis of Technical Systems, RWTH Aachen University
The introduction of isogeometric analysis (IGA), made it possible to directly exploit the
favorable geometric properties of NURBS for numerical analysis. The method has become
wide-spread in structural mechanics. However, parametrizing complex three-dimenional
domains — as needed for CFD — using closed volume splines can be challenging. NURBS-
enhanced finite elements (NEFEM) can be a viable alternative. Both methods together
lead to a geometrically compatible coupling interface for fluid-structure interaction (FSI). Within a partitioned FSI
method, the necessary projection methods simplify due to the matching geometry;
while at the same time increasing accuracy. But the spline-based description not only offers
advantages in linking the individual fields. The spline-based boundary description is also
beneficial for problems of FSI with additional complexities, e.g. free surfaces or contact.
In the talk the theoretical background of the applied spline-based FSI solver will be presented.
The numerical advantages of the presented combination of isogeometric analysis and the NURBS-enhanced
finite element method is demonstrated with simple stationary and transient test cases. With more
complex FSI test cases, additional advantages of spline-based methods are presented.