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Statements

Subject Item
n2:RIV%2F61388998%3A_____%2F11%3A00363627%21RIV12-AV0-61388998
rdf:type
skos:Concept n10:Vysledek
dcterms:description
This contribution describes the character of turbulent flow generated above series of street canyons in wind-channel. Main concern is to clarify how intermittent dynamics of the flow determines the ventilation process inside the canyon. Since geometry of building around street canyon significantly affects the flow regime, two shapes of building are studied and comparison of these two regimes is done. During experiment, velocity data are measured using PIV with high-repetition rate. Over than three thousand snapshots of instantaneous velocity are then analysed by Proper Orthogonal Decomposition (POD). This method reveals the measure of coherence of the flow and decomposes the individual snapshots into dynamics modes. For example, the first mode in shear layer (localised at the roof level) contains almost 55% of global turbulent kinetic energy, what is an in This contribution describes the character of turbulent flow generated above series of street canyons in wind-channel. Main concern is to clarify how intermittent dynamics of the flow determines the ventilation process inside the canyon. Since geometry of building around street canyon significantly affects the flow regime, two shapes of building are studied and comparison of these two regimes is done. During experiment, velocity data are measured using PIV with high-repetition rate. Over than three thousand snapshots of instantaneous velocity are then analysed by Proper Orthogonal Decomposition (POD). This method reveals the measure of coherence of the flow and decomposes the individual snapshots into dynamics modes. For example, the first mode in shear layer (localised at the roof level) contains almost 55% of global turbulent kinetic energy, what is an in
dcterms:title
Proper Orthogonal Decomposition of Turbulent Flow above Urban Area Proper Orthogonal Decomposition of Turbulent Flow above Urban Area
skos:prefLabel
Proper Orthogonal Decomposition of Turbulent Flow above Urban Area Proper Orthogonal Decomposition of Turbulent Flow above Urban Area
skos:notation
RIV/61388998:_____/11:00363627!RIV12-AV0-61388998
n10:predkladatel
n16:ico%3A61388998
n3:aktivita
n19:Z
n3:aktivity
Z(AV0Z20760514)
n3:dodaniDat
n18:2012
n3:domaciTvurceVysledku
n9:2634163 n9:8949573 n9:4644972 n9:6494315 n9:5538408
n3:druhVysledku
n8:D
n3:duvernostUdaju
n13:S
n3:entitaPredkladatele
n11:predkladatel
n3:idSjednocenehoVysledku
224655
n3:idVysledku
RIV/61388998:_____/11:00363627
n3:jazykVysledku
n7:eng
n3:klicovaSlova
wind-channel; street canyons; flat roof; pitched roof; POD
n3:klicoveSlovo
n4:POD n4:wind-channel n4:street%20canyons n4:flat%20roof n4:pitched%20roof
n3:kontrolniKodProRIV
[2F883A3FABE9]
n3:mistoKonaniAkce
Praha
n3:mistoVydani
Prague
n3:nazevZdroje
Conference Topical Problems of Fluid Mechanics 2011
n3:obor
n15:DG
n3:pocetDomacichTvurcuVysledku
5
n3:pocetTvurcuVysledku
5
n3:rokUplatneniVysledku
n18:2011
n3:tvurceVysledku
Uruba, Václav Kukačka, Libor Jurčáková, Klára Jaňour, Zbyněk Kellnerová, Radka
n3:typAkce
n21:EUR
n3:zahajeniAkce
2011-02-16+01:00
n3:zamer
n17:AV0Z20760514
s:numberOfPages
2
n20:hasPublisher
Ústav termomechaniky AV ČR
n5:isbn
978-80-87012-32-1