Work

Decoupling Methods for Fluid-Structure Interaction with Local Time-Stepping

Year: 2024

Type: article

Abstract: We introduce two global-in-time domain decomposition methods, namely the Steklov-Poincare method and the Robin method, for solving a fluid-structure interaction system. These methods allow us to formulate the coupled system as a space-time interface problem and apply iterative algorithms directly to the evolutionary problem. Each time-dependent subdomain problem is solved independently, which enables the use of different time discretization schemes and time step sizes in the subsystems. This leads to an efficient way of simulating time-dependent phenomena. We present numerical tests for both non-physical and physical problems, with various mesh sizes and time step sizes to demonstrate the accuracy and efficiency of the proposed methods.

Source: International Journal of Numerical Analysis and Modeling

DOI: 10.4208/ijnam2025-1004

Authors: Hemanta Kunwar, Hyesuk Lee

Institution: Clemson University

Language: English

Topic: Advanced Numerical Methods in Computational Mathematics

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

Open Access status: bronze

Funder: National Science Foundation

Award: Domain Decomposition Methods for Coupled Models of Non-Newtonian Fluids and Solid Structures