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

Allan P. Engsig-Karup; Claes Eskilsson

doi:10.17736/ijope.2019.jc753

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

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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 language	English
Journal	International Journal of Offshore and Polar Engineering
Volume	29
Issue number	2
Pages (from-to)	141-148
ISSN	1053-5381
DOIs	https://doi.org/10.17736/ijope.2019.jc753
Publication status	Published - 1 Jun 2019

Keywords

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

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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",

month = jun,

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doi = "10.17736/ijope.2019.jc753",

language = "English",

volume = "29",

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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

AN - SCOPUS:85068934129

VL - 29

SP - 141

EP - 148

JO - International Journal of Offshore and Polar Engineering

JF - International Journal of Offshore and Polar Engineering

SN - 1053-5381

IS - 2

ER -

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

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