TY - CHAP A1 - Seblany, Feda A1 - Homberg, Ulrike A1 - Vincens, Eric A1 - Winkler, Paul A1 - Witt, Karl Josef T1 - Merging criteria for the definition of a local pore and the CSD computation of granular materials T2 - Proceedings of the 25th meeting of the Working Group on Internal Erosion in embankment dams and their foundations Y1 - 2017 SN - 978-90-827468-1-5 | 978-90-827468-0-8 SP - 150 EP - 159 PB - Deltares CY - Delft, Netherlands ER - TY - GEN A1 - Seblany, Feda A1 - Homberg, Ulrike A1 - Vincens, Eric A1 - Winkler, Paul A1 - Witt, Karl Josef T1 - Merging criteria for the definition of a local pore and the CSD computation of granular materials T3 - ZIB-Report - 18-09 Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0297-zib-67069 SN - 1438-0064 ER - TY - JOUR A1 - Seblany, Feda A1 - Homberg, Ulrike A1 - Vincens, Eric A1 - Winkler, Paul A1 - Witt, Karl Josef T1 - Merging criteria for defining pores and constrictions in numerical packing of spheres JF - Granular Matter N2 - 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. Y1 - 2018 U6 - https://doi.org/10.1007/s10035-018-0808-z SN - 1434-5021 SN - 1434-7636 VL - 20 IS - 37 PB - Springer Berlin Heidelberg ER - TY - GEN A1 - Seblany, Feda A1 - Homberg, Ulrike A1 - Vincens, Eric A1 - Winkler, Paul A1 - Witt, Karl Josef T1 - Merging criteria for defining pores and constrictions in numerical packing of spheres N2 - 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. T3 - ZIB-Report - 18-25 Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0297-zib-69158 SN - 1438-0064 ER -