Scale effects in wind tunnel modeling of an urban atmospheric boundary layer

Kozmar, Hrvoje (2010) Scale effects in wind tunnel modeling of an urban atmospheric boundary layer. = Scale effects in wind tunnel modeling of an urban atmospheric boundary layer. Theoretical and Applied Climatology, 100 (1). pp. 153-162. ISSN 0177-798X. Vrsta rada: ["eprint_fieldopt_article_type_article" not defined]. Kvartili JCR: Q2 (2010). .

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Abstract

Precise urban atmospheric boundary layer (ABL) wind tunnel simulations are essential for a wide variety of atmospheric studies in built-up environments including wind loading of structures and air pollutant dispersion. One of key issues in addressing these problems is a proper choice of simulation length scale. In this study, an urban ABL was reproduced in a boundary layer wind tunnel at different scales to study possible scale effects. Two full-depth simulations and one part-depth simulation were carried out using castellated barrier wall, vortex generators, and a fetch of roughness elements. Redesigned "Counihan" vortex generators were employed in the part-depth ABL simulation. A hot-wire anemometry system was used to measure mean velocity and velocity fluctuations. Experimental results are presented as mean velocity, turbulence intensity, Reynolds stress, integral length scale of turbulence, and power spectral density of velocity fluctuations. Results suggest that variations in length-scale factor do not influence the generated ABL models when using similarity criteria applied in this study. Part-depth ABL simulation compares well with two full-depth ABL simulations indicating the truncated vortex generators developed for this study can be successfully employed in urban ABL part-depth simulations. © Springer-Verlag 2009.

Item Type:	Article (["eprint_fieldopt_article_type_article" not defined])
Keywords (Croatian):	anemometer; atmospheric pollution; boundary layer; simulation; turbulence; urban atmosphere; wind tunnel
Subjects:	NATURAL SCIENCES > Physics TECHNICAL SCIENCE > Geodesy TECHNICAL SCIENCE > Mechanical Engineering
Divisions:	1400 Department of fluid mechanics > 1420 Chair of environment and construction aerodynamics
Indexed in Web of Science:	Yes
Indexed in Current Contents:	Yes
Quartiles:	Q2 (2010)
Date Deposited:	10 Apr 2015 09:57
Last Modified:	06 Jun 2017 07:44
URI:	http://repozitorij.fsb.hr/id/eprint/3717

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