On the temporal stability and accuracy of coupled problems with reference to fluid–structure interaction

Authors

  • M. M. Joosten,

    1. Civil and Computational Engineering Research Centre, School of Engineering, Swansea University, Singleton Park, Swansea SA2 8PP, U.K.
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  • W. G. Dettmer,

    1. Civil and Computational Engineering Research Centre, School of Engineering, Swansea University, Singleton Park, Swansea SA2 8PP, U.K.
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  • D. Perić

    Corresponding author
    1. Civil and Computational Engineering Research Centre, School of Engineering, Swansea University, Singleton Park, Swansea SA2 8PP, U.K.
    • Civil and Computational Engineering Research Centre, School of Engineering, Swansea University, Singleton Park, Swansea SA2 8PP, U.K.
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Abstract

This work investigates the effect of employing different time integration schemes in the sub-domains of a coupled problem, such as fluid–structure interaction. On the basis of a one-dimensional model problem and the two versions of the generalized-α method developed for first- and second-order systems, it is shown that the overall problem is likely to be less stable and less accurate than the individual sub-problems unless special measures are taken. The benchmark problem of the oscillating flexible beam is used to demonstrate that these findings also apply to full computational fluid–structure interaction. Copyright © 2010 John Wiley & Sons, Ltd.

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