Measurement of the turbulent mass flux with PTV in a street canyon

被引：29

作者：

Dezsö-Weidinger, G ^{[1
]}

Stitou, A ^{[1
]}

van Beeck, J ^{[1
]}

Riethmuller, ML ^{[1
]}

机构：

[1] Von Karman Inst Fluid Dynam, Dept Environm & Appl Fluid Dynam, B-1640 Rhode St Genese, Belgium

来源：

JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS | 2003年 / 91卷 / 09期

关键词：

particle tracking velocimetry; concentration measurement; street canyon; turbulent diffusion;

D O I：

10.1016/S0167-6105(03)00054-0

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Simultaneous measurement of velocity and concentration provides a tool for studying the turbulent diffusion. This quantity until now was mainly modeled and not measured and it plays an essential role in turbulent diffusion of pollutant. We present a new technique to measure the turbulent mass flux vector, (u'c') over bar, based on the same PIV/PTV images, employed for both instantaneous velocity and concentration measurements. Then we applied the new technique to check the correctness of the model widely used for the turbulent mass flux in RANS simulations, in a street canyon type flow. We found places where the turbulent diffusion is opposite to the gradient in mean concentration. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：1117 / 1131

页数：15

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