The prior field and laboratory experiments on street canyon flow were reviewed to evaluate the next generation of urban dispersion models. Much information of dispersion and flow patterns in the urban street canyon was obtained from reduced-scale wind-tunnel experiments. Several studies show that a helical vortex is formed between two buildings if the wind is within 60 degrees of perpendicular to the building face, otherwise no vortex forms. The measurement of wind velocities at a few positions in a street canyon between two farm house buildings with peaked roofs shows that the canyon vortex is highly intermittent and the mean filed is dominated by turbulent fluctuations.
|Number of pages||11|
|Journal||Bulletin of the American Meteorological Society|
|State||Published - 2004|
|Event||Combined Preprints: 84th American Meteorological Society (AMS) Annual Meeting - Seattle, WA., United States|
Duration: Jan 11 2004 → Jan 15 2004