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Statements

Subject Item
n2:RIV%2F61388998%3A_____%2F09%3A00333098%21RIV10-MSM-61388998
rdf:type
n14:Vysledek skos:Concept
dcterms:description
As a basis for PIV measurement, turbulent characteristics of a flow were investigated by LDA over two different types of urban roughness in wind-tunnel. The roughness consists from long series of street canyons with unit aspect ratio. Different shapes of roof - flat and pitched - provide a different internal boundary layer above canyons. The latter one, generated by pitched roofs, is significantly more turbulent and thus slower then above flat roofs. Momentum flux and corresponding transport exhibits the largest deviation specially at the roof level. Ventilation in the streets is therefore distinct from each other. Quadrant analysis was applied for vertical profiles and cross-sectional areas in canyons in order to detect a domination of sweep or ejection events and to find a linkage to the third moment of velocity for both cases. The overall goal of the project is to find any of coherent structure produced by the roof edge as a low momentum region or an ejection formed by hairpin. As a basis for PIV measurement, turbulent characteristics of a flow were investigated by LDA over two different types of urban roughness in wind-tunnel. The roughness consists from long series of street canyons with unit aspect ratio. Different shapes of roof - flat and pitched - provide a different internal boundary layer above canyons. The latter one, generated by pitched roofs, is significantly more turbulent and thus slower then above flat roofs. Momentum flux and corresponding transport exhibits the largest deviation specially at the roof level. Ventilation in the streets is therefore distinct from each other. Quadrant analysis was applied for vertical profiles and cross-sectional areas in canyons in order to detect a domination of sweep or ejection events and to find a linkage to the third moment of velocity for both cases. The overall goal of the project is to find any of coherent structure produced by the roof edge as a low momentum region or an ejection formed by hairpin.
dcterms:title
Turbulent Boundary Layer generated Over Two Urban Roughnesses Turbulent Boundary Layer generated Over Two Urban Roughnesses
skos:prefLabel
Turbulent Boundary Layer generated Over Two Urban Roughnesses Turbulent Boundary Layer generated Over Two Urban Roughnesses
skos:notation
RIV/61388998:_____/09:00333098!RIV10-MSM-61388998
n4:aktivita
n16:P n16:Z
n4:aktivity
P(OC 113), Z(AV0Z20760514)
n4:dodaniDat
n11:2010
n4:domaciTvurceVysledku
n12:4644972 n12:5538408
n4:druhVysledku
n10:D
n4:duvernostUdaju
n19:S
n4:entitaPredkladatele
n18:predkladatel
n4:idSjednocenehoVysledku
347085
n4:idVysledku
RIV/61388998:_____/09:00333098
n4:jazykVysledku
n6:eng
n4:klicovaSlova
street canyon; flat and pitched roof; quadrant analysis; wavelet analysis
n4:klicoveSlovo
n5:flat%20and%20pitched%20roof n5:quadrant%20analysis n5:wavelet%20analysis n5:street%20canyon
n4:kontrolniKodProRIV
[AD8A505517C2]
n4:mistoKonaniAkce
Liberec
n4:mistoVydani
Liberec
n4:nazevZdroje
Experimental Fluid Mechanics 2009
n4:obor
n15:DG
n4:pocetDomacichTvurcuVysledku
2
n4:pocetTvurcuVysledku
2
n4:projekt
n17:OC%20113
n4:rokUplatneniVysledku
n11:2009
n4:tvurceVysledku
Jaňour, Zbyněk Kellnerová, Radka
n4:typAkce
n21:EUR
n4:zahajeniAkce
2009-11-25+01:00
n4:zamer
n8:AV0Z20760514
s:numberOfPages
10
n20:hasPublisher
Technická univerzita v Liberci
n9:isbn
978-80-7372-538-9