Simulating fluid-structure interactions using dynamic meshes that depend on interface projection
Keywords:
Space-time FSI is used for sails and parachutes, while other interface projection techniques account for air-fabric contact and fluid-structure interaction.Abstract
The Team for Advancing Flow Simulation and Modeling developed a technique called stabilized space-time fluidstructure
interaction (SSTFSI), which has been used to evaluate several 3D examples such arterial fluid mechanics and parachute
aerodynamics (TAFSM). We focus in this article on interface projection techniques that have evolved as complementary methods
for addressing the computational challenges brought on by the geometric complexities of the fluid-structure interface. The SSTFSI
approach and the study of air-fabric interactions inspired the development of these supplemental methods; nevertheless, they are
relevant to other types of FSI applications and may be utilized with other moving-mesh techniques, such as the Arbitrary
Lagrangian-Eulerian (ALE) technique. The FSI Geometric Smoo- thing Method (FSI-GST), Homogenized Modeling of Geometric
Porosity, split nodal values for pressure at fabric edges, and incompatible meshes at air-fabric interfaces are some of the current
supplemental approaches (HMGP). The model's membrane might be stabilized by using split nodal values for pressure at the edges
and incompatible meshes at the interfaces, both of which would reduce the resulting structural reaction at the edges. To mitigate the
impact of the structure's complex shape on the fluid mechanics mesh, the FSI-GST is implemented. By replacing the geometric
permeability with a locally variable "equivalent," the HMGP avoids the difficult details of the underlying geometry.
