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Granular Matter

, 20:37 | Cite as

Merging criteria for defining pores and constrictions in numerical packing of spheres

  • Feda Seblany
  • Ulrike Homberg
  • Eric Vincens
  • Paul Winkler
  • Karl Josef Witt
Original Paper

Abstract

The void space of granular materials is generally divided into larger local volumes denoted as pores and throats connecting pores. The smallest section in a throat is usually denoted as constriction. A correct description of pores and constrictions may help to understand the processes related to the transport of fluid or fine particles through granular materials, or to build models of imbibition for unsaturated granular media. In the case of numerical granular materials involving packings of spheres, different methods can be used to compute the pore space properties. However, these methods generally induce an over-segmentation of the pore network and a merging step is usually applied to mitigate such undesirable artifacts even if a precise delineation of a pore is somewhat subjective. This study provides a comparison between different merging criteria for pores in packing of spheres and a discussion about their implication on both the pore size distribution and the constriction size distribution of the material. A correspondence between these merging techniques is eventually proposed as a guide for the user.

Keywords

Delaunay tessellation Voronoï graph Void space Granular materials 

Notes

Acknowledgements

Part of this work belongs to a project funded by Compagnie Nationale du Rhône (CNR). F. Seblany and E. Vincens acknowledge CNR for its interest and its financial support.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Ecole Centrale de Lyon, LTDS, UMR CNRS 5513Université de LyonEcullyFrance
  2. 2.Department Visual Data AnalysisZuse Institute BerlinDahlem, BerlinGermany
  3. 3.Chair of Geotechnical EngineeringBauhaus-Universität WeimarWeimarGermany

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