Numerical simulation of floating bodies in extreme free surface waves
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 surfa...
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Copernicus Publications
2011-02-01
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Series: | Natural Hazards and Earth System Sciences |
Online Access: | http://www.nat-hazards-earth-syst-sci.net/11/519/2011/nhess-11-519-2011.pdf |
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doaj-2e652624234341f6833595d0cd535daa2020-11-24T22:46:35ZengCopernicus PublicationsNatural Hazards and Earth System Sciences1561-86331684-99812011-02-0111251952710.5194/nhess-11-519-2011Numerical simulation of floating bodies in extreme free surface wavesZ. Z. HuD. M. CausonC. G. MinghamL. QianIn 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. http://www.nat-hazards-earth-syst-sci.net/11/519/2011/nhess-11-519-2011.pdf |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Z. Z. Hu D. M. Causon C. G. Mingham L. Qian |
spellingShingle |
Z. Z. Hu D. M. Causon C. G. Mingham L. Qian Numerical simulation of floating bodies in extreme free surface waves Natural Hazards and Earth System Sciences |
author_facet |
Z. Z. Hu D. M. Causon C. G. Mingham L. Qian |
author_sort |
Z. Z. Hu |
title |
Numerical simulation of floating bodies in extreme free surface waves |
title_short |
Numerical simulation of floating bodies in extreme free surface waves |
title_full |
Numerical simulation of floating bodies in extreme free surface waves |
title_fullStr |
Numerical simulation of floating bodies in extreme free surface waves |
title_full_unstemmed |
Numerical simulation of floating bodies in extreme free surface waves |
title_sort |
numerical simulation of floating bodies in extreme free surface waves |
publisher |
Copernicus Publications |
series |
Natural Hazards and Earth System Sciences |
issn |
1561-8633 1684-9981 |
publishDate |
2011-02-01 |
description |
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. |
url |
http://www.nat-hazards-earth-syst-sci.net/11/519/2011/nhess-11-519-2011.pdf |
work_keys_str_mv |
AT zzhu numericalsimulationoffloatingbodiesinextremefreesurfacewaves AT dmcauson numericalsimulationoffloatingbodiesinextremefreesurfacewaves AT cgmingham numericalsimulationoffloatingbodiesinextremefreesurfacewaves AT lqian numericalsimulationoffloatingbodiesinextremefreesurfacewaves |
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1725684672733642752 |