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Turbulence Modeling, Local Grid Refinement and Absorbing Boundary Conditions for Free-Surface Flow Simulations in Offshore Applications

[+] Author Affiliations
Arthur E. P. Veldman, Roel Luppes, Henri J. L. van der Heiden, Peter van der Plas

University of Groningen, Groningen, The Netherlands

Bülent Düz, René H. M. Huijsmans

Technical University of Delft, Delft, The Netherlands

Paper No. OMAE2014-24427, pp. V002T08A076; 11 pages
doi:10.1115/OMAE2014-24427
From:
  • ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 2: CFD and VIV
  • San Francisco, California, USA, June 8–13, 2014
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 978-0-7918-4540-0
  • Copyright © 2014 by ASME

abstract

To study extreme hydrodynamic wave impact in offshore and coastal engineering, the VOF-based CFD simulation tool ComFLOW is being developed. Recently, much attention has been paid to turbulence modeling, local grid refinement, wave propagation and absorbing boundary conditions. The turbulence model has to cope with coarse grids as used in industrial applications. Thereto a blend of a QR-model and a regularization model has been designed, in combination with a dedicated wall model. Local grid refinement is based on a semi-structured approach. Near refinement interfaces special discretization stencils have been designed. The computational domain is restricted to the close environment of the objects studied. To suppress unphysical reflections, special generating and absorbing boundary conditions have been designed. The combined performance of the new ingredients will be demonstrated with several applications. For validation, experiments have been carried out at MARIN.

Copyright © 2014 by ASME

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