Experiments in Fluids

, Volume 32, Issue 1, pp 121–135

Voronoï imaging methods for the measurement of granular flows

  • H. Capart
  • D. L. Young
  • Y. Zech

DOI: 10.1007/s003480200013

Cite this article as:
Capart, H., Young, D. & Zech, Y. Experiments in Fluids (2002) 32: 121. doi:10.1007/s003480200013

Abstract

A set of digital imaging methods derived from the Voronoï diagram is proposed and tested on various liquid–granular flow applications. The methods include a novel pattern-based particle-tracking algorithm, as well as estimators of the three-dimensional granular concentration from two-dimensional images. The proposed algorithms are able to resolve individual grain motions even for rapid shear flows involving dense, fluctuating granular ensembles. Full automation is achieved, allowing the derivation of accurate statistics from large sets of individual measurements, as well as the construction of complete sets of grain trajectories. Results are presented for different applications: homogeneous fluidization, steady uniform debris flow, and unsteady debris surges.

Copyright information

© Springer-Verlag Berlin Heidelberg 2002

Authors and Affiliations

  • H. Capart
    • 1
  • D. L. Young
    • 2
  • Y. Zech
    • 3
  1. 1.Fonds National de la Recherche Scientifique and Department of Civil Engineering, Université catholique de Louvain, 1 place du Levant, 1348 Louvain-la-Neuve, BelgiumBE
  2. 2.Department of Civil Engineering and Hydrotech Research Institute, National Taiwan University, 158 Chow Shan Rd, Taipei 10617, TaiwanTW
  3. 3.Department of Civil Engineering, Université catholique de Louvain, 1 place du Levant, 1348 Louvain-la-Neuve, BelgiumBE