Characterizing the coherent structures in large eddy simulations of aligned windfarms

Mengqi Zhang*, Richard J.A.M. Stevens

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

4 Citations (Scopus)
73 Downloads (Pure)


The present work studies the large coherent structures in large eddy simulations of windfarms using proper orthogonal decomposition (POD) method. In order to evaluate the effect of wind turbines on coherent structures, we consider three cases. One is a reference flow of a neutral atmospheric boundary layer and the other two are periodic and developing aligned windfarms. The number of wind turbines is large, 16 × 12 for periodic windfarm, and 12 × 12 for developing windfarm. The simulations are run for a long time in order to generate a sufficient database for POD analysis. In all cases, elongated streamwise counter rotating roll structures, covering 1 or 2 turbines in spanwise direction, are identified as the dominant POD mode. Another pattern, varying in streamwise direction, also appears in all the three cases.

Original languageEnglish
Article number012052
JournalJournal of physics: Conference series
Issue number1
Publication statusPublished - 13 Jun 2017
EventWake Conference 2017 - Visby, Sweden
Duration: 30 May 20171 Jun 2017


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