Comparative Numerical Study on Focusing Wave Interaction with FPSO-like Structure

Yan, Shiqiang; Li, Qian; Wang, J.; Ma, Qingwei; Xie, Zhihua; Stoesser, Thorsten

doi:10.17736/ijope.2019.jc754

Cited by 14 publications

(16 citation statements)

References 31 publications

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“…StarCCM+ and CFX by Westphalen et al, 2008Westphalen et al, , 2010 and open-source codes such as the OpenFOAM (Brown et al, 2014(Brown et al, , 2015Chen et al, 2014;Hu et al, 2014Hu et al, , 2016Hu et al, , 2017, for numerical modelling the WSIs in an extreme sea. These codes were developed for either single-phase (Lind et al, 2012;Zheng et al, 2014) or multi-phase (Chen et al, 2014;Hildebrandt and Sriram, 2014;Yan et al, 2015;Hu et al, 2016;Lind et al, 2016) flow and considered either incompressible (Yang et al, 2016;Yan et al, 2019), compressible (Yang et al, 2017) or partially compressible fluids, in which the air is compressible and the water incompressible (e.g. Lind et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…the Reynolds Average NS (Yang et al, 2016) and the Large-eddy simulation (LES, e.g. Xie, 2012Xie, , 2013Xie, , 2015Yan et al, 2019), dealing with the velocity-pressure coupling, e.g. the fractional step method (Rijas et al, 2019) and PIMPLE/PISO (Hu et al, 2014(Hu et al, , 2016(Hu et al, , 2017 , modelling the motions of the floating bodies, e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Comparative studies and blind tests have been carried out aiming to quantify the accuracy and reliability of CFD codes for different WSI problems, e.g. the water entry and slamming problem (Hong et al, 2017;Dias and Ghidaglia, 2018), the extreme wave interaction with fixed structures (Ransley et al, 2019;Yan et al, 2015Yan et al, , 2019. However, such work did not result in a standard procedure or guideline leading to reliable CFD predictions but revealed a great uncertainty over the required level of model fidelity when being applied to a wide range of WSI problems.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of interaction between extreme waves and a moored FPSO using FNPT and CFD solvers

Yan

Greaves

et al. 2020

Ocean Engineering

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To assess the survivability of marine structures, numerical tools that can predict the interaction between extreme waves and structures are needed. Considering the significant nonlinearity associated with the problem, fully nonlinear models, including the fully nonlinear potential theory (FNPT) and general viscous flow theory based on the Navier-Stokes equation (NS) and Continuity equation, are necessary for a reliable prediction. Both methods have relatively higher computational cost compared to the linear or second order wave theories, which are popular in routine design practices. Although the FNPT model generally requires less computational efforts compared to the NS model, its theoretical assumption, i.e. the flow is incompressible, irrotational and inviscid, invalidates its applications to those problems with significant viscous effects and/or breaking waves. It is, therefore, necessary to conduct a comparative study on the accuracy of the FNPT in various problems to quantify its range of application. In this paper, both the Quasi Arbitrary Lagrangian Eulerian Finite Element (QALE-FEM) method based on the FNPT model and the open source Reynolds Average Navier-Stoke (RANS) based code, OpenFOAM, are used to predict the interaction between extreme waves and a moored Floating Production Storage and Offloading (FPSO) model. The extreme waves are generated using the NewWave theory and different wave steepnesses are used. The results, including the wave runup, pressure and force on the FPSO, are compared with the corresponding experimental data obtained from the ocean basin at the COAST Laboratory, University of Plymouth. Satisfactory agreement between the numerical predictions and the experimental measurements are observed. It is also concluded that the differences between the QALE-FEM results and the OpenFOAM results are mainly caused by the effectiveness of the wave generation in the corresponding simulations; the viscous effects may be considerable in the rotational motion of the FPSO when subjected to extreme waves.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigation of interaction between extreme waves and a moored FPSO using FNPT and CFD solvers

Yan

Greaves

et al. 2020

Ocean Engineering

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“…One conclusion given by Ransley et al (2019) is that FNPT methods have performed equally as well as the high fidelity methods; the FEM-based FNPT method, i.e. the Quasi Lagrangian Eulerian Finite Element Method (QALE-FEM, Ma & Yan, 2006,2009Yan & Ma, 2007;Ma et al 2015), is at least 1.5 orders of magnitude faster than the quickest NS code and has comparable predictive capability in these cases (Ransley et al 2019), where the viscous and the turbulent effects are insignificant (Yan and Xie et al 2019).…”

Section: Introductionmentioning

confidence: 99%

“…with NS solvers, including the qaleFOAM combing the QALE-FEM with openFOAM(Li et al, 2018;Yan et al 2019;Yan et al 2020) and a one-way hybrid model combining the FNPT with SPH(Zhang et al 2020), demonstrate a potential improvement in the required CPU effort when compared to the most robust NS solvers participating to the test, including one adopting the linear and second-order wave condition in the OpenFOAM (wave2Foam, Jacobsen et al 2011) . It is admitted that the implementations of different numerical models, e.g.…”

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confidence: 99%

Modelling of focused wave interaction with wave energy converter models using qaleFOAM

Wang

Yan

et al. 2020

Proceedings of the Institution of Civil Engineers - Engineering

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The paper presents a numerical investigation of the interaction between focused waves and wave energy converter (WEC) models using a hybrid solver, qaleFOAM, which couples a two-phase incompressible Navier-Stokes (NS) solver OpenFOAM/InterDyMFoam with the Quasi Lagrangian-Eulerian Finite Element Method (QALE-FEM) based on the fully nonlinear potential theory (FNPT) using the domaindecomposition approach. In the qaleFOAM, the NS solver deals with a small region near the structures (NS domain), where the viscous effect may be significant; the QALE-FEM covers the remaining computational domain (FNPT domain); an overlap (transitional) zone is applied between two domains. The WEC models, mooring system and the wave conditions are specified by the CCP-WSI (Collaborative Computational Project in Wave-Structure Interaction) Blind Test Series 2. In the numerical simulation, the incident wave is generated in the FNPT domain using a self-correction wavemaker and propagates into the NS domain through the coupling boundaries and attached transitional zones. An improved passive wave absorber is imposed at the outlet of the NS domain for wave absorption. The practical performance of the qaleFOAM is demonstrated by comparing its prediction with the experimental data, including the wave elevation, motion responses (surge, heave and pitch) and mooring load.

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A Finite Volume Based Fully Nonlinear Potential Flow Model for Water Wave Problems

Lin

Qian

Bai

et al. 2021

Applied Ocean Research

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Comparative Numerical Study on Focusing Wave Interaction with FPSO-like Structure

Cited by 14 publications

References 31 publications

Investigation of interaction between extreme waves and a moored FPSO using FNPT and CFD solvers

Investigation of interaction between extreme waves and a moored FPSO using FNPT and CFD solvers

Modelling of focused wave interaction with wave energy converter models using qaleFOAM

A Finite Volume Based Fully Nonlinear Potential Flow Model for Water Wave Problems

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