WIT Press


Describing The Dispersion Of Pollutants Near Buildings Under Low Wind-speeds: Real Scale And Numerical Results

Price

Free (open access)

Paper DOI

10.2495/ENV980151

Volume

32

Pages

10

Published

1998

Size

967 kb

Author(s)

J.M. Martins & C. Borrego

Abstract

Worst meteorological conditions in case of industrial accidents are thermal stability and low wind speeds. Low wind speed conditions (<~2 m.s"') are observed up to 60% or more of the time in southern European countries and these circumstances cannot therefore be neglected in studying accidental dispersion conditions. Real scale trials were performed in southern France, simulating releases near a L~40 x W~40 x H~20 m building. Due to low wind speeds, conventional modeling largely overestimated ground level concentra- tions near the centerline and produced a much narrower plume. Two adapted models were applied to these situations: MPUF, a multi-puff Gaussian model able for use in real-time and VADIS, a Lagrangian model; in this model pa

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