Quadrant analysis of boundary layer above pitched and flat roofs

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F09%3A00343445" target="_blank" >RIV/61388998:_____/09:00343445 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Quadrant analysis of boundary layer above pitched and flat roofs

Original language 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. Alayer 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 case

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

DG - Atmospheric sciences, meteorology

OECD FORD branch

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Project

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Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2009

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Acta Technica CSAV

ISSN

0001-7043

e-ISSN

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Volume of the periodical

54

Issue of the periodical within the volume

4

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

13

Pages from-to

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UT code for WoS article

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EID of the result in the Scopus database

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