Proper orthogonal decomposition of velocity and vorticity field  measured in turbulent flow above a complex terrain

Kellnerová, Radka; Kukačka, Libor; Uruba, Václav; Jurčáková, Klára; Jaňour, Zbyněk

Number of the records: 1

Proper orthogonal decomposition of velocity and vorticity field measured in turbulent flow above a complex terrain

1.

SYSNO ASEP	0363609
Document Type	A - Abstract
R&D Document Type	The record was not marked in the RIV
R&D Document Type	Není vybrán druh dokumentu
Title	Proper orthogonal decomposition of velocity and vorticity field measured in turbulent flow above a complex terrain
Author(s)	Kellnerová, Radka (UT-L)_{RID, ORCID} Kukačka, Libor (UT-L)_RID Uruba, Václav (UT-L)_{RID, ORCID} Jurčáková, Klára (UT-L)_{RID, ORCID} Jaňour, Zbyněk (UT-L)_{RID, ORCID}
Number of authors	5
Source Title	Coherent Flow Structures in Geop hysical Flows at Earth’s Surface. - Burnaby : Simon Fraser University, 2011 S. 52
Number of pages	1 s.
Action	COHERENT FLOW STRUCTURES IN GEOPHYSICAL FLOWS AT EARTH’S SURFACE
Event date	03.08.2011-05.08.2011
VEvent location	Burnaby
Country	CA - Canada
Event type	WRD
Language	eng - English
Country	CA - Canada
Keywords	street canyon ; POD ; vorticity
Subject RIV	DG - Athmosphere Sciences, Meteorology
CEZ	AV0Z20760514 - UT-L (2005-2011)
Annotation	Experiment with simulation of turbulent boundary layer was preformed in wind-channel. Two different geometries of canyons were tested – building with flat and triangle roof. The main interest of the project is to study an intermittent character of the flow inside the given street. Attention is paid to the main dynamical phenomena that have direct impact on flow regime in the canyon. More than 1600 snapshots are decomposed by Proper orthogonal decomposition (POD). POD from velocity reveals also the relative contribution of each mode to the TKE. The very first mode in our case contains 35% of global TKE. The same POD procedure was done with vorticity input instead of velocity vectors, however there was not found significant dominance in the modes.
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

Number of the records: 1