CONCENTRATION FLUCTUATION PROFILES FROM A WATER CHANNEL SIMULATION OF A GROUND-LEVEL RELEASE

被引：54

作者：

BARA, BM ^{[1
]}

WILSON, DJ ^{[1
]}

ZELT, BW ^{[1
]}

机构：

[1] UNIV ALBERTA,DEPT MECH ENGN,EDMONTON T6G 2G8,ALBERTA,CANADA

来源：

ATMOSPHERIC ENVIRONMENT PART A-GENERAL TOPICS | 1992年 / 26卷 / 06期

基金：

加拿大自然科学与工程研究理事会;

关键词：

PLUME DISPERSION; FLUCTUATIONS; CONCENTRATION; MEASUREMENTS;

D O I：

10.1016/0960-1686(92)90037-L

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Measurements of concentration fluctuation profiles were made in a plume of saline tracer from a ground level source in a water channel simulation of a neutrally stable rough surface atmospheric boundary layer. Vertical profiles of mean concentration showed good agreement with gradient diffusion theory relations between the mean velocity power law and concentration profile exponents. The structure and development of vertical and crosswind profiles of mean, variance, intermittency and conditional intensity of non-zero fluctuations were satisfactorily represented using an isotropic meandering plume model combined with a clipped normal concentration probability distribution. Near the edges of the plume, the clipped normal pdf overestimated the fraction of non zero concentration periods.

引用

页码：1053 / 1062

页数：10

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