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Volume 22, Issue 1
Decoupling Methods for Fluid-Structure Interaction with Local Time-Stepping

Hemanta Kunwar & Hyesuk Lee

DOI: 10.4208/ijnam2025-1004

Int. J. Numer. Anal. Mod., 22 (2025), pp. 71-95.

Published online: 2024-11

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  • 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.

  • Keywords

Fluid-structure interaction, domain decomposition, local time stepping.

  • AMS Subject Headings

65N22, 65N30, 76M10, 74F10

  • Copyright

COPYRIGHT: © Global Science Press

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@Article{IJNAM-22-71, author = {Kunwar , Hemanta and Lee , Hyesuk}, title = {Decoupling Methods for Fluid-Structure Interaction with Local Time-Stepping}, journal = {International Journal of Numerical Analysis and Modeling}, year = {2024}, volume = {22}, number = {1}, pages = {71--95}, 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.

}, issn = {2617-8710}, doi = {https://doi.org/10.4208/ijnam2025-1004}, url = {http://global-sci.org/intro/article_detail/ijnam/23567.html} }
TY - JOUR T1 - Decoupling Methods for Fluid-Structure Interaction with Local Time-Stepping AU - Kunwar , Hemanta AU - Lee , Hyesuk JO - International Journal of Numerical Analysis and Modeling VL - 1 SP - 71 EP - 95 PY - 2024 DA - 2024/11 SN - 22 DO - http://doi.org/10.4208/ijnam2025-1004 UR - https://global-sci.org/intro/article_detail/ijnam/23567.html KW - Fluid-structure interaction, domain decomposition, local time stepping. AB -

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.

Kunwar , Hemanta and Lee , Hyesuk. (2024). Decoupling Methods for Fluid-Structure Interaction with Local Time-Stepping. International Journal of Numerical Analysis and Modeling. 22 (1). 71-95. doi:10.4208/ijnam2025-1004
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