Advertisement

Experiments in Fluids

, Volume 22, Issue 3, pp 199–211 | Cite as

A hybrid digital particle tracking velocimetry technique

  • E. A. Cowen
  • S. G. Monismith
  • E. A. Cowen
  • S. G. Monismith

Abstract

A novel approach to digital particle tracking velocimetry (DPTV) based on cross-correlation digital particle image velocimetry (DPIV) is presented that eliminates the need to interpolate the randomly located velocity vectors (typical of tracking techniques) and results in significantly improved resolution and accuracy. In particular, this approach allows for the direct measurement of mean squared fluctuating gradients, and thus several important components of the turbulent dissipation. The effect of various parameters (seeding density, particle diameter, dynamic range, out-of-plane motion, and gradient strength) on accuracy for both DPTV and DPIV are investigated using a Monte Carlo simulation and optimal values are reported. Validation results are presented from the comparison of measurements by the DPTV technique in a turbulent flat plate boundary layer to laser Doppler anemometer (LDA) measurements in the same flow as well as direct numerical simulation (DNS) data. The DPIV analysis of the images used for the DPTV validation is included for comparison.

Keywords

Boundary Layer Monte Carlo Simulation Particle Image Velocimetry Direct Numerical Simulation Flat Plate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • E. A. Cowen
    • 1
  • S. G. Monismith
    • 1
  • E. A. Cowen
    • 1
  • S. G. Monismith
    • 1
  1. 1.Environmental Fluid Mechanics Laboratory Stanford University, Stanford, CA 94305-4020, USAUS

Personalised recommendations