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

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