November 28, 2018

Colloquium: A finite-difference/finite-element framework for fluid-structure interaction using an immersed boundary method with variational transfer

Prof. Dr. Dominik Obrist, ARTORG Center for Biomedical Engineering Research, University of Bern

November 28, 2018 4:00 PM  
Hörsaal 7.01, Pfaffenwaldring 7


The flow systems of the heart and the great blood vessels comprise complex materials (soft tissue) and flows at moderately high Reynolds numbers which may undergo transition from laminar to turbulent flow. Computational modelling of such fluid-structure interaction (FSI) problems requires efficient high-fidelity solvers for structure and flow as well as a robust scheme for coupling the two phases.

We present a new FSI framework which comprises a finite-element solver for the full elastodynamics equations of the structure and a Navier-Stokes solver using high-order finite-difference schemes. The interaction between fluid and structure is modelled by an immersed boundary ansatz which uses a variational scheme for transferring data between the structural mesh and the Cartesian fluid grid.


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