Journal Article

Simulating fluid-structure interactions using dynamic meshes that depend on interface projection

Crabtree, J, Tezduyar, Tayfun E, Crabtree, Jason

2021

Overview

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.

• Publisher: Society of Scientific Research and Education (SSRE)
• Subject: Accuracy / Algorithms / Fluid mechanics / Fluid-structure interaction / Geometry / Interfaces / Methods / Reynolds number / Spacetime