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Description
  • The experiment uses wind-tunnel modeling method to investigate an intermittent ventilation of pollutants within an urban intersection and adjacent canyon. The skewness and kurtosis of velocity components were obtained in order to identify an area with strong intermittent tendency. Pollutants have released from line source and mean concentration was obtained using slow flame ionization detector. Vertical vortices as well as corner vortices are responsible for accumulation of emissions emitted by vehicle traffic. However, flow instabilities corresponding to enhancement of skewness can reduce or enhance the instantaneous level of exhalations. Vertical and horizontal momentum flux was analyzed by quadrant analysis. The method has detected the localities with highest momentum transfer from free stream down to the canyon. The connection between sweep and skewness in this area was found.
  • The experiment uses wind-tunnel modeling method to investigate an intermittent ventilation of pollutants within an urban intersection and adjacent canyon. The skewness and kurtosis of velocity components were obtained in order to identify an area with strong intermittent tendency. Pollutants have released from line source and mean concentration was obtained using slow flame ionization detector. Vertical vortices as well as corner vortices are responsible for accumulation of emissions emitted by vehicle traffic. However, flow instabilities corresponding to enhancement of skewness can reduce or enhance the instantaneous level of exhalations. Vertical and horizontal momentum flux was analyzed by quadrant analysis. The method has detected the localities with highest momentum transfer from free stream down to the canyon. The connection between sweep and skewness in this area was found. (en)
  • Metodou fyzikálního modelování vyšetřujeme intermitentní ventilaci znečištění v oblasti městské křižovatky a sousední ulice. Za účelem najít oblasti s intenzivním výskytem náhlých poryvů byly získány charakteristiky šikmosti a špičatosti. Emise byly vypouštěny z liniového zdroje a střední hodnota koncentrace se změřila pomalým plameno-ionizačním detektorem. Vertikální víry jako i rohové víry jsou zodpovědné za akumulaci emisí produkované dopravou. Nicméně, nestability spojené s výraznou šikmostí v distribuci rychlosti mohou redukovat nebo zesílit okamžitou hodnotu exhalací. Vertikální a horizontální tok hybnosti byl rozložen kvadrantovou analýzou. Tato metoda detekuje oblasti s nejvyšším transferem hybnosti z nabíhajícího proudění směrem dolů do kaňonu. Spojitost mezi %22sweep%22 a šikmostí byla nalezena. (cs)
Title
  • Flow dynamics inside an Urban Intersection: Skewness and Kurtosis characteristics
  • Flow dynamics inside an Urban Intersection: Skewness and Kurtosis characteristics (en)
  • Dynamika proudění uvnitř městské křižovatky: charakteristiky šikmosti a špičatosti (cs)
skos:prefLabel
  • Flow dynamics inside an Urban Intersection: Skewness and Kurtosis characteristics
  • Flow dynamics inside an Urban Intersection: Skewness and Kurtosis characteristics (en)
  • Dynamika proudění uvnitř městské křižovatky: charakteristiky šikmosti a špičatosti (cs)
skos:notation
  • RIV/61388998:_____/08:00316699!RIV09-AV0-61388998
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • Z(AV0Z20760514)
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 368200
http://linked.open...ai/riv/idVysledku
  • RIV/61388998:_____/08:00316699
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • street canyon; urban intersection; skewness; quadrant analysis (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...ontrolniKodProRIV
  • [ABF4F2344754]
http://linked.open...v/mistoKonaniAkce
  • Liberec
http://linked.open...i/riv/mistoVydani
  • Liberec
http://linked.open...i/riv/nazevZdroje
  • Experimental Fluid Mechanics 2008
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...UplatneniVysledku
http://linked.open...iv/tvurceVysledku
  • Jaňour, Zbyněk
  • Kellnerová, Radka
http://linked.open...vavai/riv/typAkce
http://linked.open...ain/vavai/riv/wos
  • 000264706100011
http://linked.open.../riv/zahajeniAkce
http://linked.open...n/vavai/riv/zamer
number of pages
http://purl.org/ne...btex#hasPublisher
  • TU Liberec
https://schema.org/isbn
  • 978-80-7372-417-7
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