About: Quadrant analysis of boundary layer above pitched and flat roofs

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
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. (en)
Title	Quadrant analysis of boundary layer above pitched and flat roofs Quadrant analysis of boundary layer above pitched and flat roofs (en)
skos:prefLabel	Quadrant analysis of boundary layer above pitched and flat roofs Quadrant analysis of boundary layer above pitched and flat roofs (en)
skos:notation	RIV/61388998:_____/09:00343445!RIV11-AV0-61388998
http://linked.open...avai/riv/aktivita	Z
http://linked.open...avai/riv/aktivity	Z(AV0Z20760514)
http://linked.open...iv/cisloPeriodika	4
http://linked.open...vai/riv/dodaniDat	2011
http://linked.open...aciTvurceVysledku	Kukačka, Libor Kellnerová, Radka Jaňour, Zbyněk
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav termomechaniky AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	337767
http://linked.open...ai/riv/idVysledku	RIV/61388998:_____/09:00343445
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	street canyon; flat and pitched roofs; quadrant analysis (en)
http://linked.open.../riv/klicoveSlovo	quadrant analysis street canyon flat and pitched roofs
http://linked.open...odStatuVydavatele	CZ - Česká republika
http://linked.open...ontrolniKodProRIV	[30FB12D22497]
http://linked.open...i/riv/nazevZdroje	Acta Technica ČSAV
http://linked.open...in/vavai/riv/obor	DG
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...UplatneniVysledku	2009
http://linked.open...v/svazekPeriodika	54
http://linked.open...iv/tvurceVysledku	Jaňour, Zbyněk Kellnerová, Radka Kukačka, Libor
http://linked.open...n/vavai/riv/zamer	Complex dynamical systems in thermodynamics, fluid and solid mechanics
issn	0001-7043
number of pages	13 (xsd:int)

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