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Towards a General-Purpose Open Boundary Condition for Wave Simulations

[+] Author Affiliations
Bulent Duz, Rene H. M. Huijsmans

Technical University of Delft, Delft, The Netherlands

Peter R. Wellens, Mart J. A. Borsboom

Deltares, Delft, The Netherlands

Arthur E. P. Veldman

University of Groningen, Groningen, The Netherlands

Paper No. OMAE2011-49979, pp. 557-565; 9 pages
doi:10.1115/OMAE2011-49979
From:
  • ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 7: CFD and VIV; Offshore Geotechnics
  • Rotterdam, The Netherlands, June 19–24, 2011
  • ISBN: 978-0-7918-4439-7
  • Copyright © 2011 by ASME

abstract

For the design of FPSO’s in harsh environments an accurate assessment of the ability of the platform to survive in extreme sea conditions is of prime importance. Next to scaled model tests on the FPSO in waves also CFD capabilities are at the disposal of the designer. However even with the fastest computers available it is still a challenge to use CFD in the design stage because of the large computational resources they require. In that respect to use a small computational domain will improve the turn around time of the computations, however at the expense of various numerical artifacts, like reflection on artificial boundaries in the computational domain. In order to mitigate the reflection properties new absorbing boundary conditions have been developed. The work in this paper is constructed on the previous study about the generating and absorbing boundary condition (GABC) in the ComFLOW project. We present a method to apply the GABC on all the boundaries in a three dimensional domain. The implementation of the GABC in ComFLOW is explained in detail.

Copyright © 2011 by ASME

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