Regensburg 2010 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 24: Turbulence and wind energy

DY 24.6: Talk

Thursday, March 25, 2010, 11:15–11:30, H47

Measurement of Lagrangian Particle Trajectories by Digital in-line Holography — •Tim Homeyer, Christoph Hindriksen, Gerd Gülker, and Joachim Peinke — ForWind, University of Oldenburg, Institute of Physics, Germany

A digital holographic in-line setup was used to track particles in a small turbulence chamber. Different particle validation methods have been tested to filter out speckles and to enhance accuracy of the longitudinal particle coordinates. In first measurements particle trajectories were measured and visualized together with fitted spline curves. A pronounced decrease of the standard deviation of the particle coordinates with respect to their spline curves was achieved.