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Comparison of wavelet analysis with velocity derivatives for detection of shear layer and vortices inside a turbulent boundary layer
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SYSNO ASEP 0370298 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Comparison of wavelet analysis with velocity derivatives for detection of shear layer and vortices inside a turbulent boundary layer Author(s) Kellnerová, Radka (UT-L) RID, ORCID
Kukačka, Libor (UT-L) RID
Jurčáková, Klára (UT-L) RID, ORCID
Uruba, Václav (UT-L) RID, ORCID
Jaňour, Zbyněk (UT-L) RID, ORCIDSource Title Journal of Physics: Conference Series. - : Institute of Physics Publishing - ISSN 1742-6588
Roč. 318, - (2011), s. 1-10Number of pages 10 s. Action European Turbulence Conference /13./ Event date 12.09.2011-15.09.2011 VEvent location Warsaw Country PL - Poland Event type WRD Language eng - English Country GB - United Kingdom Keywords Wavelet analysis ; street canyon ; POD Subject RIV DG - Athmosphere Sciences, Meteorology CEZ AV0Z20760514 - UT-L (2005-2011) DOI 10.1088/1742-6596/318/6/062012 Annotation Detection of highly energetic structure in the turbulent flow can be easily done by wavelet analysis, especially with Morlet function as a mother wavelet for detection of repetitious low-frequency structures and Mexican hat for detection of vortices. Since wavelet analysis can be simply applied on one-point measurement, the better understanding of its meaning is welcome. In this project, turbulent boundary layer was investigated with focus on intermittent dynamics. PIV snapshot were used for comparison with Wavelet analysis results, since PIV was performed with high sample frequency (500 Hz). Instantaneous snapshots of velocity and vorticity were studied also by POD and spectra of particular expansion coefficients were computed. Vorticity from planar velocity vectors was used as a suitable methods for recognition of strongly deformed streamlines. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2012 Electronic address http://iopscience.iop.org/1742-6596/318/6/062012?fromSearchPage=true
Number of the records: 1