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dc.contributor.authorTsiolakis, Vasileios
dc.contributor.authorKvamsdal, Trond
dc.contributor.authorRasheed, Adil
dc.contributor.authorFonn, Eivind
dc.contributor.authorBrummelen, Harald van
dc.identifier.citationJournal of Physics: Conference Series (JPCS), 2018, 012042.en_US
dc.description.abstractThe computational cost of the design optimisation of wind turbines, as well as the optimisation of the operation and maintenance of offshore wind farms represents a limitation to the application of conventional simulation methods. New techniques such as reduced order modelling (ROM) and technologies such as hybrid-analysis methods and digital twins have increased in popularity due to their ability to deliver numerical results at a significant speed-up with reasonable accuracy. This work presents a hybrid projection-based proper orthogonal decomposition (POD) strategy applied to transient turbulent flow problems. Key feature of this work is the applicability of the methodology to high Reynolds number cases and the stabilisation of pressure in the online phase via the assembly of the so-called pressure Poisson equation. Another significant part of this work is the implementation of an interpolation scheme for the eddy viscosity field in the classical POD-Galerkin strategy. The sampling procedure and the calculation of the reduced operators in the offline phase is carried out using the finite volume method (FVM), OpenFOAM's libraries specifically, while the construction of the reduced basis and the solution of the online phase is carried out in Python. The capability of the resulting ROM is tested using the two-dimensional flow around a NACA0015 airfoil at 17° angle of attack with Reynolds number of approximately 300 000.en_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.titleReduced order models for finite-volume simulations of turbulent flow around wind-turbine bladesen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.rights.holderContent from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.en_US
dc.source.journalJournal of Physics: Conference Series (JPCS)en_US
dc.relation.projectNorges forskningsråd: 268044en_US
dc.relation.projectNorges forskningsråd: 304229en_US

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