| Issue |
EPJ Web Conf.
Volume 140, 2017
Powders and Grains 2017 – 8th International Conference on Micromechanics on Granular Media
|
|
|---|---|---|
| Article Number | 05002 | |
| Number of page(s) | 4 | |
| Section | Particle Properties | |
| DOI | https://doi.org/10.1051/epjconf/201714005002 | |
| Published online | 30 June 2017 | |
https://doi.org/10.1051/epjconf/201714005002
Application of spherical harmonics analysis on LBS particles and LBS fragments
Department of Architecture and Civil Engineering, City University of Hong Kong, Hong Kong
* e-mail: bdzhao2-c@my.cityu.edu.hk
Published online: 30 June 2017
This paper applies surface parameterization and spherical harmonics analysis to the characterization of particle shapes of Leighton Buzzard sand (LBS) particles and LBS fragments obtained from X-ray micro-tomography (μCT). The rotation, transition and scale independent spherical coefficients were obtained. The relationship between spherical coefficients and shape parameters of form, roundness and compactness was investigated. The coefficients of degree one determine the principal dimensions of an ellipsoid, which has a similar aspect ratio with the original surface. The coefficients of higher degree characterise more details by increasing the percentage of higher and lower mean curvature on the reconstructed surface. As the spherical degree increases, the reconstructed surface tend to have lower particle roundness, sphericity and convexity, and higher aspect ratio.
© The Authors, published by EDP Sciences, 2017
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