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Space/time multigrid for a fluid--structure-interaction problem

Published: 01 December 2008 Publication History

Abstract

The basic iterative method for solving fluid-structure-interaction problems is a defect-correction process based on a partitioning of the underlying operator into a fluid part and a structural part. In the present work we establish for a prototypical model problem that this defect-correction process yields an excellent smoother for multigrid, on account of the relative compactness of the fluid part of the operator with respect to the structural part. We show that the defect-correction process in fact represents an asymptotically-perfect smoother, i.e., the effectiveness of the smoother increases as the mesh is refined. Consequently, on sufficiently fine meshes the fluid-structure-interaction problem can be solved to arbitrary accuracy by one iteration of the defect-correction process followed by a coarse-grid correction. Another important property of the defect-correction process is that it smoothens the error in space/time, so that the coarsening in the multigrid method can be applied in both space and time.

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Published In

cover image Applied Numerical Mathematics
Applied Numerical Mathematics  Volume 58, Issue 12
December, 2008
236 pages

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Elsevier Science Publishers B. V.

Netherlands

Publication History

Published: 01 December 2008

Author Tags

  1. Asymptotically-perfect smoothing
  2. Fluid--structure interaction
  3. Relatively-compact partitions
  4. Space/time finite-element methods.
  5. Space/time multigrid
  6. Subiteration

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  • (2020)A Parallel Newton Multigrid Framework for Monolithic Fluid-Structure InteractionsJournal of Scientific Computing10.1007/s10915-019-01113-y82:2Online publication date: 21-Jan-2020
  • (2017)Parallelization of an Unsteady ALE Solver with Deforming Mesh Using OpenACCScientific Programming10.1155/2017/46101382017Online publication date: 1-Jan-2017
  • (2016)Coupling vs decoupling approaches for PDE/ODE systems modeling intercellular signalingJournal of Computational Physics10.1016/j.jcp.2016.03.020314:C(522-537)Online publication date: 1-Jun-2016
  • (2016)Parallel coupling numerics for partitioned fluid-structure interaction simulationsComputers & Mathematics with Applications10.1016/j.camwa.2015.12.02571:4(869-891)Online publication date: 1-Feb-2016
  • (2011)An investigation of Interface-GMRES(R) for fluid---structure interaction problems with flutter and divergenceComputational Mechanics10.1007/s00466-010-0519-847:1(17-29)Online publication date: 1-Jan-2011

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