Validation of vortex code viscous models using lidar wake measurements and CFD

Emmanuel Branlard, Ewan Machefaux, Mac Gaunaa, Hans Henrik Brandenborg Sørensen, Niels Troldborg

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


The newly implemented vortex code Omnivor coupled to the aero-servo-elastic tool hawc2 is described in this paper. Vortex wake improvements by the implementation of viscous effects are considered. Different viscous models are implemented and compared with each other. Turbulent flow fields with sheared inflow are used to compare the vortex code performance with CFD and lidar measurements. Laminar CFD computations are used to evaluate the performance of the viscous models. Consistent results between the vortex code and CFD tool are obtained up to three diameters downstream. The modelling of viscous boundaries appear more important than the modelling of viscosity in the wake. External turbulence and shear appear sufficient but their full potential flow modelling would be preferred.
Original languageEnglish
Title of host publicationProceedings of EWEA 2014
Number of pages10
PublisherEuropean Wind Energy Association (EWEA)
Publication date2014
Publication statusPublished - 2014
EventEuropean Wind Energy Conference & Exhibition 2014 - Fira de Barcelona Gran Via, Barcelona, Spain
Duration: 10 Mar 201413 Mar 2014


ConferenceEuropean Wind Energy Conference & Exhibition 2014
LocationFira de Barcelona Gran Via
Internet address

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