Fluid Structure Interactions

Fluid structure interaction problems occur in physics whenever the flow over a structure causes deformation which in turn, may influence the way the fluid behaves. In order to accurately representing these interactions, the fluid part and the structural part evolve in a coupled system where fluid forces applied on the solid and solid displacements through the fluid interact at each time step.

This opens a very wide range of analysis and applications such as the fatigue of airplane wings, airfoils or turbine blades for the aerospace and turbo machinery industry, the study of galloping, vibrations and fluttering of flaps, bridges or similar structures, the analysis of artificial heart valve openings or other prosthesis for the bio-medical industry and so on.

One of the solver's main features is the implementation of a robust strong FSI coupling that be triggered through the use of LS-DYNA's implicit solver for the solid mechanics part.

This test case features a FSI test case where strong coupling is needed in order to avoid the instabilities due to the so called ”added mass effect” that occurs when the density of the solid approaches the density of the fluid. This test case is often referred to as "The Turek test case" from the name of one of its co-authors (Read more).

 The purpose of this FSI test case is to study the vertical induced oscillations of a rectangle under the influence of a incoming flow. This test case provides the first step in order to study complex oscillatory phenomena such as the fluttering of a bridge deck (Read more).
 This test case is part of the SPHERIC benchmark library and is a combination of a free surface problem with a FSI problem and requires strong coupling capabilities. It is therefore a good candidate to highlight the ICFD solver's capabilities (Read more)