| Main Title |
Video images of smoke dispersion in the near wake of a building, part 1. : temporal and spatial scales of vortex shedding / |
| Author |
Huber, Alan H.
|
| Other Authors |
|
| CORP Author |
Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab. |
| Publisher |
United States Environmental Protection Agency, Office of Research and Development, Atmospheric Sciences Research Laboratory, |
| Year Published |
1988 |
| Report Number |
EPA/600/J-88/332 |
| Stock Number |
PB89-206676 |
| Additional Subjects |
Vortices ;
Wakes ;
Air pollution ;
Flow visualization ;
Wind tunnel models ;
Turbulence ;
Smoke ;
Video signals ;
Dispersions ;
Measurement ;
Wind(Meteorology) ;
Buildings ;
Experimental data ;
Vortex flow
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB89-206676 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
38 pages ; 28 cm |
| Abstract |
In a wind-tunnel study, recorded video images of smoke dispersion in the wake of a rectangular-shaped building were analyzed. A continuous source of smoke was emitted at floor level, midway along the leeward side of the building. Smoke was observed to build up within a region adjacent to the building. Then the smoke was periodically swept away by vortices shed from the leeward building sides and roof. The applicability of analyzing time series of smoke scattered light for selected quantized video picture elements was favorably demonstrated. Temporal and spatial scales of vortex-shedding of smoke puffs near the center of the wake were quantified through the calculation of spectral densities and autocorrelations. The dominant frequencies (cycles/second) near the center of the wake flow were found to be 0.1-0.3 times the ratio of the velocity to the building height. Estimated integral length scales near the center of the wake flow were found to be 1-2 times the building height. |
| Notes |
"Reprint article published in Journal of Wind Engineering and Industrial Aerodynamics, vol. 31, (1988), pp. 189-223." Caption title. "Journal article." Microfiche. |
| Place Published |
Research Triangle Park, NC : |
| Supplementary Notes |
Pub. in Jnl. of Wind Engineering and Industrial Aerodynamics, v31 p189-224 1988. |
| Corporate Au Added Ent |
Atmospheric Sciences Research Laboratory. |
| Alternate Title |
Temporal and spatial scales of vortex shedding. |
| PUB Date Free Form |
1988. |
| NTIS Prices |
PC A03/MF A01 |
| BIB Level |
m |
| Cataloging Source |
OCLC/T |
| OCLC Time Stamp |
20000810133313 |
| Language |
eng |
| Origin |
NTIS |
| Type |
MERGE |
| OCLC Rec Leader |
01236nam 2200277Ka 45020 |
