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Wind Tunnel Measurement of Turbulent and Advective Scalar Fluxes : A Case Study on Intersection Ventilation
Joint Authors
Kellnerová, Radka
Kukačka, Libor
Jaňour, Zbyněk
Nosek, Štĕpán
Jurčáková, Klára
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-04-30
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Natural & Life Sciences (Multidisciplinary)
Medicine
Information Technology and Computer Science
Abstract EN
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 measurement of the flow velocity and the tracer gas concentration in a high temporal resolution is assembled.
Advective horizontal and vertical scalar fluxes are computed from averaged measured velocity and concentration data within the street intersection.
Vertical advective and turbulent scalar fluxes are computed from synchronized velocity and concentration signals measured in the plane above the intersection.
All the results are obtained for five approach flow directions.
The influence of the approach flow on the advective and turbulent fluxes is determined.
The contribution of the advective and turbulent flux to the ventilation is discussed.
Wind direction with the best dispersive conditions in the area is found.
The quadrant analysis is applied to the synchronized signals of velocity and concentration fluctuation to determine events with the dominant contribution to the momentum flux and turbulent scalar flux.
American Psychological Association (APA)
Kukačka, Libor& Nosek, Štĕpán& Kellnerová, Radka& Jurčáková, Klára& Jaňour, Zbyněk. 2012. Wind Tunnel Measurement of Turbulent and Advective Scalar Fluxes : A Case Study on Intersection Ventilation. The Scientific World Journal،Vol. 2012, no. 2012, pp.1-13.
https://search.emarefa.net/detail/BIM-467567
Modern Language Association (MLA)
Kukačka, Libor…[et al.]. Wind Tunnel Measurement of Turbulent and Advective Scalar Fluxes : A Case Study on Intersection Ventilation. The Scientific World Journal No. 2012 (2012), pp.1-13.
https://search.emarefa.net/detail/BIM-467567
American Medical Association (AMA)
Kukačka, Libor& Nosek, Štĕpán& Kellnerová, Radka& Jurčáková, Klára& Jaňour, Zbyněk. Wind Tunnel Measurement of Turbulent and Advective Scalar Fluxes : A Case Study on Intersection Ventilation. The Scientific World Journal. 2012. Vol. 2012, no. 2012, pp.1-13.
https://search.emarefa.net/detail/BIM-467567
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-467567