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Title: Granule-by-granule reconstruction of a sandpile from x-ray microtomography data

Abstract

Mesoscale disordered materials are ubiquitous in industry and in the environment. Any fundamental understanding of the transport and mechanical properties of such materials must follow from a thorough understanding of their structure. However, in the overwhelming majority of cases, experimental characterization of such materials has been limited to first- and second-order structural correlation functions, i.e., the mean filling fraction and the structural autocorrelation function. We report here the successful combination of synchrotron x-ray microtomography and image processing to determine the full three-dimensional real-space structure of a model disordered material, a granular bed of relatively monodisperse glass spheres. Specifically, we determine the center location and the local connectivity of each granule. This complete knowledge of structure can be used to calculate otherwise inaccessible high-order correlation functions. We analyze nematic order parameters for contact bonds to characterize the geometric anisotropy or fabric induced by the sample boundary conditions. Away from the boundaries we find short-range bond orientational order exhibiting characteristics of the underlying polytetrahedral structure.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Sponsoring Org.:
(US)
OSTI Identifier:
40205411
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review E; Journal Volume: 62; Journal Issue: 6; Other Information: Othernumber: PLEEE8000062000006008175000001; 047010PRE; PBD: Dec 2000
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ANISOTROPY; BOUNDARY CONDITIONS; CORRELATION FUNCTIONS; GLASS; IMAGE PROCESSING; MECHANICAL PROPERTIES; ORDER PARAMETERS; SYNCHROTRONS; TRANSPORT

Citation Formats

Seidler, G. T., Martinez, G., Seeley, L. H., Kim, K. H., Behne, E. A., Zaranek, S., Chapman, B. D., Heald, S. M., and Brewe, D. L. Granule-by-granule reconstruction of a sandpile from x-ray microtomography data. United States: N. p., 2000. Web. doi:10.1103/PhysRevE.62.8175.
Seidler, G. T., Martinez, G., Seeley, L. H., Kim, K. H., Behne, E. A., Zaranek, S., Chapman, B. D., Heald, S. M., & Brewe, D. L. Granule-by-granule reconstruction of a sandpile from x-ray microtomography data. United States. doi:10.1103/PhysRevE.62.8175.
Seidler, G. T., Martinez, G., Seeley, L. H., Kim, K. H., Behne, E. A., Zaranek, S., Chapman, B. D., Heald, S. M., and Brewe, D. L. Fri . "Granule-by-granule reconstruction of a sandpile from x-ray microtomography data". United States. doi:10.1103/PhysRevE.62.8175.
@article{osti_40205411,
title = {Granule-by-granule reconstruction of a sandpile from x-ray microtomography data},
author = {Seidler, G. T. and Martinez, G. and Seeley, L. H. and Kim, K. H. and Behne, E. A. and Zaranek, S. and Chapman, B. D. and Heald, S. M. and Brewe, D. L.},
abstractNote = {Mesoscale disordered materials are ubiquitous in industry and in the environment. Any fundamental understanding of the transport and mechanical properties of such materials must follow from a thorough understanding of their structure. However, in the overwhelming majority of cases, experimental characterization of such materials has been limited to first- and second-order structural correlation functions, i.e., the mean filling fraction and the structural autocorrelation function. We report here the successful combination of synchrotron x-ray microtomography and image processing to determine the full three-dimensional real-space structure of a model disordered material, a granular bed of relatively monodisperse glass spheres. Specifically, we determine the center location and the local connectivity of each granule. This complete knowledge of structure can be used to calculate otherwise inaccessible high-order correlation functions. We analyze nematic order parameters for contact bonds to characterize the geometric anisotropy or fabric induced by the sample boundary conditions. Away from the boundaries we find short-range bond orientational order exhibiting characteristics of the underlying polytetrahedral structure.},
doi = {10.1103/PhysRevE.62.8175},
journal = {Physical Review E},
number = 6,
volume = 62,
place = {United States},
year = {Fri Dec 01 00:00:00 EST 2000},
month = {Fri Dec 01 00:00:00 EST 2000}
}