Spectral element FNPF simulation of focused wave groups impacting a fixed FPSO-type body

Allan P. Engsig-Karup, Claes Eskilsson

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A 3D fully nonlinear potential flow (FNPF) model based on an Eulerian formulation is presented. The model is discretizedusing high-order prismatic – possibly curvilinear – elements using a spectral element method (SEM) that has support foradaptive unstructured meshes. The paper presents details of the FNPF-SEM development, and a model is illustrated toexhibit exponential convergence for steep stream function waves to serve as validation. The model is then applied to the caseof focused waves impacting on a surface-piercing, fixed FPSO-like structure. Good agreement is found between numericaland experimental wave elevations and pressures.

Original languageEnglish
JournalInternational Journal of Offshore and Polar Engineering
Volume29
Issue number2
Pages (from-to)141-148
ISSN1053-5381
DOIs
Publication statusPublished - 1 Jun 2019

Keywords

  • Focused wave
  • FPSO
  • Fully nonlinear potential flow
  • High-order numerical methods
  • Spectral element method
  • Unstructured meshes
  • Wave–body interaction

Cite this

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title = "Spectral element FNPF simulation of focused wave groups impacting a fixed FPSO-type body",
abstract = "A 3D fully nonlinear potential flow (FNPF) model based on an Eulerian formulation is presented. The model is discretizedusing high-order prismatic – possibly curvilinear – elements using a spectral element method (SEM) that has support foradaptive unstructured meshes. The paper presents details of the FNPF-SEM development, and a model is illustrated toexhibit exponential convergence for steep stream function waves to serve as validation. The model is then applied to the caseof focused waves impacting on a surface-piercing, fixed FPSO-like structure. Good agreement is found between numericaland experimental wave elevations and pressures.",
keywords = "Focused wave, FPSO, Fully nonlinear potential flow, High-order numerical methods, Spectral element method, Unstructured meshes, Wave–body interaction",
author = "Engsig-Karup, {Allan P.} and Claes Eskilsson",
year = "2019",
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Spectral element FNPF simulation of focused wave groups impacting a fixed FPSO-type body. / Engsig-Karup, Allan P.; Eskilsson, Claes.

In: International Journal of Offshore and Polar Engineering, Vol. 29, No. 2, 01.06.2019, p. 141-148.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Spectral element FNPF simulation of focused wave groups impacting a fixed FPSO-type body

AU - Engsig-Karup, Allan P.

AU - Eskilsson, Claes

PY - 2019/6/1

Y1 - 2019/6/1

N2 - A 3D fully nonlinear potential flow (FNPF) model based on an Eulerian formulation is presented. The model is discretizedusing high-order prismatic – possibly curvilinear – elements using a spectral element method (SEM) that has support foradaptive unstructured meshes. The paper presents details of the FNPF-SEM development, and a model is illustrated toexhibit exponential convergence for steep stream function waves to serve as validation. The model is then applied to the caseof focused waves impacting on a surface-piercing, fixed FPSO-like structure. Good agreement is found between numericaland experimental wave elevations and pressures.

AB - A 3D fully nonlinear potential flow (FNPF) model based on an Eulerian formulation is presented. The model is discretizedusing high-order prismatic – possibly curvilinear – elements using a spectral element method (SEM) that has support foradaptive unstructured meshes. The paper presents details of the FNPF-SEM development, and a model is illustrated toexhibit exponential convergence for steep stream function waves to serve as validation. The model is then applied to the caseof focused waves impacting on a surface-piercing, fixed FPSO-like structure. Good agreement is found between numericaland experimental wave elevations and pressures.

KW - Focused wave

KW - FPSO

KW - Fully nonlinear potential flow

KW - High-order numerical methods

KW - Spectral element method

KW - Unstructured meshes

KW - Wave–body interaction

U2 - 10.17736/ijope.2019.jc753

DO - 10.17736/ijope.2019.jc753

M3 - Journal article

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VL - 29

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EP - 148

JO - International Journal of Offshore and Polar Engineering

JF - International Journal of Offshore and Polar Engineering

SN - 1053-5381

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