Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Libor Kukačka"'
Publikováno v:
The Scientific World Journal, Vol 2012 (2012)
The objective of this study is to determine processes of pollution ventilation in the X-shaped street intersection in an idealized symmetric urban area for the changing approach flow direction. A unique experimental setup for simultaneous wind tunnel
Externí odkaz:
https://doaj.org/article/e9ab41a0fb054f7caaff543a856f1969
Publikováno v:
Building and Environment. 138:221-234
The prediction of pollution within street canyons remains challenging due to the complexity of turbulent flows in urban environments. To improve our understanding of these flows and their relation to the ventilation of street-canyons, we studied poll
Publikováno v:
Boundary-Layer Meteorology. 159:259-284
The ventilation processes in three different street canyons of variable roof geometry were investigated in a wind tunnel using a ground-level line source. All three street canyons were part of an urban-type array formed by courtyard-type buildings wi
Publikováno v:
Environmental pollution (Barking, Essex : 1987). 227
This paper presents an extension of our previous wind-tunnel study (Nosek et al., 2016) in which we highlighted the need for investigation of the removal mechanisms of traffic pollution from all openings of a 3D street canyon. The extension represent
Publikováno v:
Journal of Wind Engineering and Industrial Aerodynamics. :302-313
Turbulent flow inside a street canyon was investigated in a wind-channel. Velocity measurements were performed in vertical planes by means of particle image velocimetry (PIV) at the repetition rate 500 Hz. Two geometries were used for comparison purp
Publikováno v:
The Scientific World Journal
The Scientific World Journal, Vol 2012 (2012)
The Scientific World Journal, Vol 2012 (2012)
The objective of this study is to determine processes of pollution ventilation in the X-shaped street intersection in an idealized symmetric urban area for the changing approach flow direction. A unique experimental setup for simultaneous wind tunnel
Publikováno v:
EPJ Web of Conferences, Vol 180, p 02125 (2018)
Owing to the spatial variability of an urban area, even the transport of passive scalar is complex. The examination of the pollutant transport in such turbulent flow as occur within the urban canopy requires the measurements not only the advective bu
Publikováno v:
EPJ Web of Conferences, Vol 67, p 02051 (2014)
Wavelet analysis is applied to data from PIV measurement in order to recognize a specific structure in the flow. The PIV snaphots achieved on the model of the street canyon was used as a test case. Four flow characteristics that are at disposal from
Publikováno v:
EPJ Web of Conferences, Vol 67, p 02084 (2014)
Previous study concerned of qualitative modelling neutrally stratified flow over open-cut coal mine and important surrounding topography at meso-scale (1:9000) revealed an important area for quantitative modelling of atmospheric dispersion at small-s
Publikováno v:
EPJ Web of Conferences, Vol 67, p 02062 (2014)
In order to estimate the ventilation of vehicle pollution within street canyons, a wind tunnel experiment and a large eddy simulation (LES) was performed. A model of an idealised urban area with apartment houses arranged to courtyards was designed ac