CFD investigations of breaking focused wave-induced loads on a monopile and the effect of breaker location

Ankit Aggarwal*, Pietro D. Tomaselli, Erik Damgaard Christensen, Hans Bihs

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The design of new offshore structures requires the calculation of the wave-induced loads. In this regard, the Computational Fluid Dynamics (CFD) methodology has shown to be a reliable tool, in the case of breaking waves especially. In this paper, two CFD models are tested in the reproduction of the experimental spilling waves impacting a circular cylinder for four different wave impact scenarios for focused waves. The numerical and experimental free surface elevations at different locations around the cylinder are also compared to verify both numerical models. The numerical results from the models are shown together with the experimental measurements. Both CFD models are able to model the impact forces with a reasonable accuracy. When the cylinder is placed at a distance of 0.7 m from the wave breaking point, the value of the measured wave impact forces is highest due to the overturning wave crest and air-entrainment. The wave-induced impact forces decrease, when the monopile is placed at distances further away from the breaking location.
Original languageEnglish
Article number021903
JournalJournal of Offshore Mechanics and Arctic Engineering
Volume142
Issue number2
Number of pages8
ISSN0892-7219
DOIs
Publication statusPublished - 2020

Keywords

  • Computational fluid dynamics
  • Design of offshore structures
  • Fluid-structure interaction
  • Hydrodynamics

Cite this

@article{dc19ecefeb83485a9bfed36fdf8c324d,
title = "CFD investigations of breaking focused wave-induced loads on a monopile and the effect of breaker location",
abstract = "The design of new offshore structures requires the calculation of the wave-induced loads. In this regard, the Computational Fluid Dynamics (CFD) methodology has shown to be a reliable tool, in the case of breaking waves especially. In this paper, two CFD models are tested in the reproduction of the experimental spilling waves impacting a circular cylinder for four different wave impact scenarios for focused waves. The numerical and experimental free surface elevations at different locations around the cylinder are also compared to verify both numerical models. The numerical results from the models are shown together with the experimental measurements. Both CFD models are able to model the impact forces with a reasonable accuracy. When the cylinder is placed at a distance of 0.7 m from the wave breaking point, the value of the measured wave impact forces is highest due to the overturning wave crest and air-entrainment. The wave-induced impact forces decrease, when the monopile is placed at distances further away from the breaking location.",
keywords = "Computational fluid dynamics, Design of offshore structures, Fluid-structure interaction, Hydrodynamics",
author = "Ankit Aggarwal and Tomaselli, {Pietro D.} and Christensen, {Erik Damgaard} and Hans Bihs",
year = "2020",
doi = "10.1115/1.4045187",
language = "English",
volume = "142",
journal = "Journal of Offshore Mechanics and Arctic Engineering",
issn = "0892-7219",
publisher = "American Society of Mechanical Engineers",
number = "2",

}

CFD investigations of breaking focused wave-induced loads on a monopile and the effect of breaker location. / Aggarwal, Ankit; Tomaselli, Pietro D.; Christensen, Erik Damgaard; Bihs, Hans.

In: Journal of Offshore Mechanics and Arctic Engineering, Vol. 142, No. 2, 021903, 2020.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - CFD investigations of breaking focused wave-induced loads on a monopile and the effect of breaker location

AU - Aggarwal, Ankit

AU - Tomaselli, Pietro D.

AU - Christensen, Erik Damgaard

AU - Bihs, Hans

PY - 2020

Y1 - 2020

N2 - The design of new offshore structures requires the calculation of the wave-induced loads. In this regard, the Computational Fluid Dynamics (CFD) methodology has shown to be a reliable tool, in the case of breaking waves especially. In this paper, two CFD models are tested in the reproduction of the experimental spilling waves impacting a circular cylinder for four different wave impact scenarios for focused waves. The numerical and experimental free surface elevations at different locations around the cylinder are also compared to verify both numerical models. The numerical results from the models are shown together with the experimental measurements. Both CFD models are able to model the impact forces with a reasonable accuracy. When the cylinder is placed at a distance of 0.7 m from the wave breaking point, the value of the measured wave impact forces is highest due to the overturning wave crest and air-entrainment. The wave-induced impact forces decrease, when the monopile is placed at distances further away from the breaking location.

AB - The design of new offshore structures requires the calculation of the wave-induced loads. In this regard, the Computational Fluid Dynamics (CFD) methodology has shown to be a reliable tool, in the case of breaking waves especially. In this paper, two CFD models are tested in the reproduction of the experimental spilling waves impacting a circular cylinder for four different wave impact scenarios for focused waves. The numerical and experimental free surface elevations at different locations around the cylinder are also compared to verify both numerical models. The numerical results from the models are shown together with the experimental measurements. Both CFD models are able to model the impact forces with a reasonable accuracy. When the cylinder is placed at a distance of 0.7 m from the wave breaking point, the value of the measured wave impact forces is highest due to the overturning wave crest and air-entrainment. The wave-induced impact forces decrease, when the monopile is placed at distances further away from the breaking location.

KW - Computational fluid dynamics

KW - Design of offshore structures

KW - Fluid-structure interaction

KW - Hydrodynamics

U2 - 10.1115/1.4045187

DO - 10.1115/1.4045187

M3 - Journal article

VL - 142

JO - Journal of Offshore Mechanics and Arctic Engineering

JF - Journal of Offshore Mechanics and Arctic Engineering

SN - 0892-7219

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M1 - 021903

ER -