Intermittency and Length Scale Distributions in Plane Turbulent Plumes
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Authors
Chandrasekhara, M.S.
Ramaprian, B.R.
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Abstract
Previous studies have shown that normalized Reynolds shear
stress and turbulent heat fluxes in asymptotic plane turbulent
plumes are significantly higher than in asymptotic plane turbulent
jets. This paper describes an attempt to relate this increase
to the length scales in the flow. Hot/cold interface
intermittency and integral-length-scale distributions were
measured in both these flows. The interface-intermittency distributions
were found to be bell-shaped in the plume in contrast
to a nearly top-hat shape in a jet, thus providing confirmation
of the role of buoyancy in generating larger scales in plumes.
These larger scales cause the integral length of turbulence in
the plume to increase by nearly 15 percent relative to the non-buoyant
jet.
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Trans. ASME Journal of Fluids Engineering, Vol. 112, No. 3, pp. 367-369, Sep. 1990.
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U.S. National Science Foundation
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U.S. National Science Foundation
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M.S.Chandrasekhara, and B.R.Ramaprian, ﾓIntermittency and Length Scale Distributions in Plane Turbulent Plumesﾔ, Trans. ASME Journal of Fluids Engineering, Vol. 112, No. 3, pp. 367-369, Sep. 1990.
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.