Probability density of turbulence from multiple field particle image velocimetry
Abstract
The theory is developed for a particle image velocimetry measurement procedure in which particles moving in a two-dimensional region of a steady turbulent flow are photographed repeatedly to build up a statistical ensemble of flow field realizations on a single photographic plate. Each interrogation spot on the plate contains a sample of the probability density function for the two components of velocity that lie in the photographic object plane. This sample can be measured by two-dimensional spatial correlation analysis. In general, the measured probability is biased toward low velocities, but with proper experimental design this bias can be avoided.
- Publication:
-
5th Symposium on Turbulent Shear Flows
- Pub Date:
- 1985
- Bibcode:
- 1985stsf.proc...11A
- Keywords:
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- Photographic Measurement;
- Probability Density Functions;
- Turbulence Meters;
- Turbulent Flow;
- Velocity Measurement;
- Steady Flow;
- Two Dimensional Flow;
- Fluid Mechanics and Heat Transfer