Experiments in Fluids

, Volume 39, Issue 1, pp 1–9

Particle field characterization by digital in-line holography: 3D location and sizing

Authors

  • S. L. Pu
    • UMR 6614 CoriaTechnopole du Madrillet
    • Clean Energy And Environment Engineering Key Lab of MOEZhejiang University
  • D. Allano
    • UMR 6614 CoriaTechnopole du Madrillet
  • B. Patte-Rouland
    • UMR 6614 CoriaTechnopole du Madrillet
  • M. Malek
    • UMR 6614 CoriaTechnopole du Madrillet
    • UMR 6614 CoriaTechnopole du Madrillet
  • K. F. Cen
    • Clean Energy And Environment Engineering Key Lab of MOEZhejiang University
Originals

DOI: 10.1007/s00348-005-0937-0

Cite this article as:
Pu, S.L., Allano, D., Patte-Rouland, B. et al. Exp Fluids (2005) 39: 1. doi:10.1007/s00348-005-0937-0

Abstract

Recent developments have shown the potential of digital in-line holography for diagnostics in fluids. This new method provides a low-cost and easy access method for measuring both size and velocity of small particles in a volume. Here it is shown that by applying traditional image processing tools on the particle images digitally reconstructed, statistically reliable results on particles size and location are provided. The method is experimentally illustrated by glass microspheres that are moving in a turbulent flow generated by an annular jet. A comparison with the histogram diameters provided by a common diffraction particle sizer are presented.

List of symbols

1−O (ξ, η)

Amplitude distribution in the object field

Iz (x,y)

Intensity distribution at a distance z

Ze

Distance from the object to the sensor plane

Zr

Reconstruction distance

Zs

Curvature radius of the illuminating wave front

λ

Wavelength of the laser source

Hz(x,y)

Fresnel Kernel

ψz (x,y)

Reconstruction wavelet function

R (x ,y)

Reconstructed image

PSF(x, y)

Point spread function

δCCD

Pixel size

d

Theoretical diameter of the particle image

D

Diameter of the experimental particle image

F

Beam obscuration

ɛ

Tolerance parameter for sampling condition

δz

Measurement accuracy on axial coordinate

Copyright information

© Springer-Verlag 2005