Multiscale Space-Time Methods for Fluid-Structure Interaction Analysis with Topology Change, Slip Interfaces and Thermal Effects
Abstract
Major Goals: The major goal of this project was to develop a new set of integrated multiscale space-time (ST) methods for fluid-structure interaction (FSI) analysis involving the fundamental challenges of topology change in the domain, slip interfaces between the subdomains, and multiscale coupling between the flow and thermal transport. The ST Variational Multiscale (ST-VMS) method we developed earlier was giving us, in addition to a VMS turbulence model, the ST accuracy. Like an arbitrary Lagrangian-Eulerian (ALE) method, the ST-VMS moves with the fluid-solid interfaces the high-resolution meshes placed there. With a new ST-VMS method we targeted developing in this project, we maintain those high-resolution meshes even when there is a topology change in the domain, such as contact between solid surfaces. We also proposed in this project developing the ST-VMS version of the variationally consistent slip interface methods that have recently been successful in the ALE-VMS context. With that, we can handle the subdomains that contain spinning structures with the ST accuracy. With a new STVMS method we also proposed developing for coupled flow and thermal-transport equations, we can have a method that is multiscale in the way small-scale thermo-fluid behavior is represented in the computations. These new methods, when properly integrated together, enable successfully addressing the formidable computational challenges of a wide range of FSI applications. Accomplishments: In computation of flow problems with moving solid surfaces, moving-mesh methods such as the Space-Time (ST) Variational Multiscale method enable mesh-resolution control near the solid surfaces and thus high-resolution boundary-layer representation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 02, 2023
- Accession Number
- AD1229259
Entities
People
- Tayfun Tezduyar
Organizations
- Rice University