Establishing direct phenomenological connections between fluid and structure by the Koopman-Linearly Time-Invariant analysis

• Published in: Physics of fluids (1994) Vol. 33; no. 12
• Main Author: Weerasuriya, Asiri Umenga
• Format: Journal Article
• Language: English
• Published: Melville American Institute of Physics 01.12.2021
• Subjects: Configurations; Constitutive relationships; Dynamical systems; Fluid dynamics; Fluid flow; Fluid-structure interaction; Invariants; Nonlinear dynamics; Phenomenology; Physics; Shear flow

In this work, we introduce a novel data-driven formulation, the Koopman-Linearly Time-Invariant (Koopman-LTI) analysis, for analyzing Fluid-Structure Interactions (FSI). An implementation of the Koopman-LTI on a subcritical free-shear flow over a prism at Re = 22 000 corroborated a configuration-wis...