Charakteristiky proudění a difúze velikosti mikroměřítka uvnitř městské zástavby
Microscale flow and diffusion characteristics inside the urban area
diploma thesis (DEFENDED)
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http://hdl.handle.net/20.500.11956/20976Identifiers
Study Information System: 48082
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- Kvalifikační práce [10926]
Author
Advisor
Referee
Brechler, Josef
Faculty / Institute
Faculty of Mathematics and Physics
Discipline
Meteorology and Climatology
Department
Department of Atmospheric Physics
Date of defense
19. 5. 2009
Publisher
Univerzita Karlova, Matematicko-fyzikální fakultaLanguage
Czech
Grade
Excellent
Dispersion of pollutants in the atmosphere of urban areas is the important task in environmental sciences. The main goal was the quantitative studying of a flow in a symmetrical urban built-up area depending on a running on flow direction. There was given a theoretical base of the physical modeling of the atmospheric boundary layer in this work. The measurement was done with a model of the urban build-up area at a scale of 1:200 in the aerodynamic wind tunnel of the IT AS CR, v.v.i. in Nový Knín. The requirements to the similarity to a real atmospheric boundary layer and a model boundary layer in the wind tunnel were accomplished. Velocity fields, concentration fields and fields of scalar uxes were measured in the area of a rectangular intersection. Results of the experiment showed significant sensitivity of the velocity field about the running on flow direction that extensively inuenced ventilation of street canyons.