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Numerical simulation of wave-body interaction problem using hybrid CFD scheme

Authors
Nam, B.W.Hong, S.Y.Kim, Y.Yang, K.K.
Issue Date
2011
Keywords
Finite volume method; Hybrid CFD scheme; Run-up; VOF method; Wave exciting force; Wave-body interaction
Citation
Proceedings of the International Offshore and Polar Engineering Conference, pp 626 - 632
Pages
7
Journal Title
Proceedings of the International Offshore and Polar Engineering Conference
Start Page
626
End Page
632
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/8855
ISSN
1098-6189
Abstract
In this study, wave-body interaction problem is numerically simulated using a efficient hybrid CFD scheme. In the developed scheme, Navier-Stoke(N-S) solutions are combined with potential-based solutions by introducing buffer zone. In the buffer zone, the near field solution from finite volume method with volume-of-fluid(VOF) scheme is gradually changed to potential-based solutions. Two different potential solutions are used in this study. First one is based on Stokes' wave theory and second is based on fully nonlinear potential model which is solved by classical finite element method(FEM). Four different basic models including sphere, truncated cylinder, submerged cylindrical body and bottom-mounted cylinder are numerically investigated in regular/irregular or focusing wave conditions. In order to validate efficiency and accuracy of hybrid scheme, wave exciting forces and run-up from hybrid scheme are compared with experiments and potential-based solutions. Comparison results are fairly good to show the validity of present hybrid CFD scheme. Copyright ? 2011 by the International Society of Offshore and Polar Engineers (ISOPE).
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