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Statements

Subject Item
n2:RIV%2F61388998%3A_____%2F09%3A00343445%21RIV11-AV0-61388998
rdf:type
n12:Vysledek skos:Concept
dcterms:description
Boundary layer over two types of urban roughness in wind-tunnel is investigated. The roughness is composed from rows of street canyons with two shapes of roof— flat and pitched. Different roofs produce different internal boundary layers above canyons. A layer generated by pitched roofs, is significantly more turbulent since it provides a larger vertical variation for the wind passing above. Momentum flux and corresponding transport exhibits diverse development, extension and magnitude as well. Ventilation in streets is therefore distinct from each other. Flat roofs generate rather larger eddies in street canyon, which does not disturb the ventilation significantly. Adversely, geometry of pitched roofs enables to wind to attack on the core of recirculation zone and break it. Quadrant analysis is 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. Boundary layer over two types of urban roughness in wind-tunnel is investigated. The roughness is composed from rows of street canyons with two shapes of roof— flat and pitched. Different roofs produce different internal boundary layers above canyons. A layer generated by pitched roofs, is significantly more turbulent since it provides a larger vertical variation for the wind passing above. Momentum flux and corresponding transport exhibits diverse development, extension and magnitude as well. Ventilation in streets is therefore distinct from each other. Flat roofs generate rather larger eddies in street canyon, which does not disturb the ventilation significantly. Adversely, geometry of pitched roofs enables to wind to attack on the core of recirculation zone and break it. Quadrant analysis is 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.
dcterms:title
Quadrant analysis of boundary layer above pitched and flat roofs Quadrant analysis of boundary layer above pitched and flat roofs
skos:prefLabel
Quadrant analysis of boundary layer above pitched and flat roofs Quadrant analysis of boundary layer above pitched and flat roofs
skos:notation
RIV/61388998:_____/09:00343445!RIV11-AV0-61388998
n3:aktivita
n15:Z
n3:aktivity
Z(AV0Z20760514)
n3:cisloPeriodika
4
n3:dodaniDat
n6:2011
n3:domaciTvurceVysledku
n4:2634163 n4:5538408 n4:4644972
n3:druhVysledku
n8:J
n3:duvernostUdaju
n16:S
n3:entitaPredkladatele
n7:predkladatel
n3:idSjednocenehoVysledku
337767
n3:idVysledku
RIV/61388998:_____/09:00343445
n3:jazykVysledku
n9:eng
n3:klicovaSlova
street canyon; flat and pitched roofs; quadrant analysis
n3:klicoveSlovo
n5:flat%20and%20pitched%20roofs n5:street%20canyon n5:quadrant%20analysis
n3:kodStatuVydavatele
CZ - Česká republika
n3:kontrolniKodProRIV
[30FB12D22497]
n3:nazevZdroje
Acta Technica ČSAV
n3:obor
n14:DG
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
3
n3:rokUplatneniVysledku
n6:2009
n3:svazekPeriodika
54
n3:tvurceVysledku
Jaňour, Zbyněk Kellnerová, Radka Kukačka, Libor
n3:zamer
n13:AV0Z20760514
s:issn
0001-7043
s:numberOfPages
13