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Geometric effects in random assemblies of ellipses

Abstract

Assemblies of anisotropic particles commonly appear in studies of active many-body systems. However, in two dimensions, the geometric ramifications of the finite density of such objects are not entirely understood. To fully characterize these effects, we perform an in-depth study of random assemblies generated by a slow compression of frictionless elliptical particles. The obtained configurations are then analysed using the Set Voronoi tessellation which takes the particle shape into the account. Not only that we analyse most scalar and vectorial morphological measures, which are commonly discussed in the literature or which have been recently addressed in experiments, but also systematically explore the correlations between them. While in a limited range of parameters similarities with findings in 3D assemblies could be identified, important differences are found when a broad range of aspect ratios and packing fractions are considered. The data discussed in this study should thus provide a unique reference set such that geometric effects and differences from random assemblies could be clearly identified in more complex systems, including ones with soft and active particles that are typically found in biological systems.

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Supplementary files

Publication details

The article was received on 28 May 2019, accepted on 03 Oct 2019 and first published on 04 Oct 2019


Article type: Paper
DOI: 10.1039/C9SM01067J
Soft Matter, 2019, Accepted Manuscript

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    Geometric effects in random assemblies of ellipses

    J. Lovrić, S. Kaliman, W. Barfuss, G. Schroeder-Turk and A. Smith, Soft Matter, 2019, Accepted Manuscript , DOI: 10.1039/C9SM01067J

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