Energy events in the atmospheric boundary layer

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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