The fine-scale structure of the velocity field of turbulent jets
Abstract
Champagne (1978) recently obtained new data on the fine structure of the velocity u in both atmospheric turbulent boundary layer and various laboratory flows with a view to examining the data for evidence of universal behavior and local isotropy. The present investigation is concerned with the statistics of the partial derivative du/dt measured in both plane and circular jets with an aim to verify the spectral variation observed by Champagne. Aspects of experimental arrangement and technique are discussed. The velocity fluctuation was measured with a 2.5 micrometers dia. Wollaston (Pt-10% Rh) hot wire. Attention is given to the effect of varying the low-pass filter cut-off on the flatness factor.
- Publication:
-
7th Australasian Conference on Hydraulics and Fluid Mechanics
- Pub Date:
- 1981
- Bibcode:
- 1981hfm..conf..302S
- Keywords:
-
- Fine Structure;
- Flow Measurement;
- Flow Velocity;
- Probability Density Functions;
- Turbulent Jets;
- Velocity Distribution;
- Atmospheric Boundary Layer;
- Hot-Wire Flowmeters;
- Low Pass Filters;
- Reynolds Number;
- Spectrum Analysis;
- Turbulent Boundary Layer;
- Turbulent Flow;
- Fluid Mechanics and Heat Transfer