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Techniques for the Eduction of Coherent Structures from Flow Measurements in the Atmospheric Boundary Layer
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.). KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0001-8667-0520
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.). KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0002-1146-3241
2012 (English)In: Boundary-layer Meteorology, ISSN 0006-8314, E-ISSN 1573-1472, Vol. 143, no 3, 433-450 p.Article in journal (Refereed) Published
Abstract [en]

Two empirical methods to detect coherent motions embedded in the flow field have been compared, namely the variable interval time average (VITA) method and a wavelet-based technique, both with artificial signals as well as velocity measurements from the atmospheric boundary layer over a forest canopy. It has been found that the wavelet method is slightly better than the VITA approach in coherent structure eduction, even if the results of both techniques are comparable. Also the application of the present approach to simultaneous conditionally sampled wind data has highlighted some important features of coherent structures and gust generation in canopy flows.

Place, publisher, year, edition, pages
Springer, 2012. Vol. 143, no 3, 433-450 p.
Keyword [en]
Canopy flows, Coherent structures, Conditional sampling
National Category
Meteorology and Atmospheric Sciences
Identifiers
URN: urn:nbn:se:kth:diva-98320DOI: 10.1007/s10546-012-9708-7ISI: 000304555900002Scopus ID: 2-s2.0-84861597804OAI: oai:DiVA.org:kth-98320DiVA: diva2:536944
Funder
StandUpStandUp for Wind
Note

QC 20120625

Available from: 2012-06-25 Created: 2012-06-25 Last updated: 2017-12-07Bibliographically approved

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Segalini, AntonioAlfredsson, P. Henrik

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