Detailed analysis of POD method applied on turbulent flow

0370982 - ÚT 2012 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Kellnerová, Radka - Kukačka, Libor - Uruba, Václav - Jurčáková, Klára - Jaňour, Zbyněk
Detailed analysis of POD method applied on turbulent flow.
Experimental Fluid Mechanics 2011. Liberec: Technical University of Liberec, 2011 - (Vít, T.; Dančová, P.; Movotný, P.), s. 250-256. ISBN 978-80-7372-784-0.
[Experimental Fluid Mechanics 2011. Jičín (CZ), 22.11.2011-25.11.2011]
Výzkumný záměr: CEZ:AV0Z20760514
Klíčová slova: coherent structures * orthogonal decomposition * roughterrain
Kód oboru RIV: DG - Vědy o atmosféře, meteorologie
www.kez.tul.cz

Proper orthogonal decomposition (POD) on very turbulent flow inside the street canyon is performed. The energy contribution of each mode is yielded up. Also, physical meaning of the POD method is clarified. Particular modes of POD are assigned to the particular flow events like sweep event, vortex behind the roof or vor- tex at the bottom of street. Test of POD sensitivity on the length of data recording is done when the acquisition time increases up to its triple value. Test with decreasing sample frequency is executed. Further, interpola- tion of POD expansion coefficient is attempted in order to test possible increase in sample frequency and get new information about flow from the POD analysis. We tested linear and spline sort of interpolation and the linear one brought slightly better results.
Trvalý link: http://hdl.handle.net/11104/0204647