An investigation of the diffusion of instantaneous plumes

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:422946

Mazzolini, D ^[1]

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1. Univ. of Montana, Butte, MT (United States). Environmental Engineering Dept.

In this paper, a series of recent tracer experiments are described in which data were collected to study the instantaneous diffusion of plumes. During July, 1995, sulfur hexafluoride (SF{sub 6}) was released from a ground-level point source, and instantaneous concentration distributions were measured using a fast-response SF{sub 6} analyzer while traversing back-and-forth in the plume, 300--400 m downwind. A UVW anemometer was used to measure the winds during each test. While more than 100 plumes were sampled during a five-day period, test conditions and preliminary results are presented here for nine 20-min tests which included approximately 60 plume traverses. The purpose of this research is to develop and test relationships between the instantaneous diffusion coefficients and simple meteorological parameters, and ultimately, these relationships will be available for use in models such as the meandering plume model of O`Neill (1996) described in this issue.

• OSTI ID: 422946
• Report Number(s): CONF-960127--
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
AIR POLLUTION
DIFFUSION
ENVIRONMENTAL TRANSPORT
METEOROLOGY
PLUMES
POLLUTANTS