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| Titel |
Numerical simulation of floating bodies in extreme free surface waves |
| VerfasserIn |
Z. Z. Hu, D. M. Causon, C. G. Mingham, L. Qian |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 11, no. 2 ; Nr. 11, no. 2 (2011-02-16), S.519-527 |
| Datensatznummer |
250009164
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| Publikation (Nr.) |
 copernicus.org/nhess-11-519-2011.pdf |
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| Zusammenfassung |
| In this paper, we use the in-house Computational Fluid Dynamics (CFD) flow
code AMAZON-SC as a numerical wave tank (NWT) to study wave loading on a
wave energy converter (WEC) device in heave motion. This is a
surface-capturing method for two fluid flows that treats the free surface as
contact surface in the density field that is captured automatically without
special provision. A time-accurate artificial compressibility method and
high resolution Godunov-type scheme are employed in both fluid regions
(air/water). The Cartesian cut cell method can provide a boundary-fitted
mesh for a complex geometry with no requirement to re-mesh globally or even
locally for moving geometry, requiring only changes to cut cell data at the
body contour. Extreme wave boundary conditions are prescribed in an empty
NWT and compared with physical experiments prior to calculations of extreme
waves acting on a floating Bobber-type device. The validation work also
includes the wave force on a fixed cylinder compared with theoretical and
experimental data under regular waves. Results include free surface
elevations, vertical displacement of the float, induced vertical velocity
and heave force for a typical Bobber geometry with a hemispherical base
under extreme wave conditions. |
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