Narasimha, Roddam and Kailas, Sudarsh V (1987) Energy events in the atmospheric boundary layer. Technical Report. National Aeronautical Laboratory, Bangalore, India.
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Abstract
Turbulent velocity fluctuations in the atmospheric boundary13; layer are analysed using the VITA technique, with a view to13; understand the relation of the special events detected by the technique with turbulent bursts at high Reynolds numbers. Utilising data acquired under conditions of neutral stability at the Boulder Atmospheric Observatory, it is found that the quot;energy eventsquot; so detected are qualitatively similar in many respects to the turbulent bursts observed at much lower Reynolds numbers in the laboratory, but last longer and occur less frequently, in a manner not inconsistent with outer scalling. It is concluded that high Reynolds number flows reveal bursts tending to scale on outer variables - a conclusion that is considered particularly significant as wall parameters are of the same order in the atmospheric boundary layer as in the laboratory flows that have been widely studied.
| Item Type: | Proj.Doc/Technical Report (Technical Report) |
|---|---|
| Additional Information: | Paper presented at the International Symposium on quot;Perspectives in Turbulence Studiesquot; dedicated to the 75th birthday of Dr J C Rotta |
| Uncontrolled Keywords: | Boundary layer;Turbulent burst;Atmosphere;Energy event |
| Subjects: | GEOSCIENCES > Energy Production and Conversion GEOSCIENCES > Meteorology and Climatology |
| Division/Department: | Fluid Dynamics, Other |
| Depositing User: | Mr. Ravikumar R |
| Date Deposited: | 19 Sep 2006 |
| Last Modified: | 24 May 2010 09:50 |
| URI: | http://nal-ir.nal.res.in/id/eprint/2737 |
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