Space–time finite element computation of complex fluid–structure interactions

Abstract

SUMMARYNew special fluid-structure interaction (FSI) techniques, supplementing the ones developed earlier, are employed with the Stabilized Space-Time FSI (SSTFSI) technique. The new special techniques include improved ways of calculating the equivalent fabric porosity in Homogenized Modeling of Geometric Porosity (HMGP), improved ways of building a starting point in FSI computations, ways of accounting for fluid forces acting on structural components that are not expected to influence the flow, adaptive HMGP, and multiscale sequentially coupled FSI techniques. While FSI modeling of complex parachutes was the motivation behind developing some of these techniques, they are also applicable to other classes of complex FSI problems. We also present new ideas to increase the scope of our FSI and CFD techniques.

Space–time fluid–structure interaction modeling of patient‐specific cerebral aneurysms

“…With this technique, we can reduce the FSI computational effort where we do not need it and increase the accuracy of the structural mechanics computation where we need accurate, detailed structural mechanics computations, such as computing the fabric stresses in a parachute FSI. Test computations for parachute modeling, with different purposes of using the SCFSI M2C technique, were presented in [59,63,110].…”

Space–time computations in practical engineering applications: a summary of the 25-year history

“…The FSI computations reported in 2009 [64][65][66] and 2010 [67][68][69][70][71][72][73] were for detailed parachute and artery analysis. The detailed studies were mainly on cerebral arteries with aneurysm, Orion spacecraft parachutes, and reefed stages of the Orion spacecraft parachutes.…”

Verification and Validation of the Spring Model Parachute Air Delivery System in Subsonic Flow

“…Some of the successful studies include those reported in [28,27,24,29,25,26], where the Deforming-SpatialDomain/Stabilized Space-Time (DSD/SST) method [34,35] was used in [27,24,29,25,26]. The studies in [37,36,31,32,38] also used the DSD/SST as the core numerical method, but involved new versions and special techniques. These studies successfully addressed the computational challenges in handling the geometric complexities of the parachute canopy and the contact between parachutes in a cluster.…”