The decay of mean and turbulent quantities vertical forced plumes

Integral Solution for the Mean Flow Profiles of Turbulent Jets, Plumes, and Wakes

Integral methods are used to derive similarity solutions for several quantities of interest including the cross-stream velocity, Reynolds stress, the dominant turbulent kinetic energy production term, and eddy diffusivities of momentum and heat for axisymmetric and planar turbulent jets, plumes, and wakes. A universal constant is evaluated for axisymmetric and planar plumes. The cross-stream ve...

Spatial variations of the mean and statistical quantities in the thermal boundary layers of turbulent convection

An experimental study of Rayleigh-Bénard turbulent convection in a cubic cell is presented. We measure the mean temperature profiles, the root mean square (RMS) temperature profiles and the thermal boundary layer thickness for various values of the Rayleigh number Ra and at various positions x along the direction of large-scale circulation (LSC), using water as the working fluid. The scaled mea...

Extraction of plumes in turbulent thermal convection.

We present a scheme to extract the velocity of buoyant structures in turbulent thermal convection from simultaneous local velocity and temperature measurements. Applying this scheme to measurements taken at positions within the convection cell where the buoyant structures are dominated by plumes, we obtain the temperature dependence of the plume velocity and understand our results using the equ...

Forced Turbulent Shear Layer

effect of postharvest application of chitosan and calcium chloride on decay and quality attributes of sweet cherry

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