Structural similarity between dry and wet sphere packings

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Abstract

The mechanical properties of granular materials change significantly in the presence of a wetting liquid which creates capillary bridges between the particles. Here we demonstrate, using X-ray tomographies of dry and wet sphere packings, that this change in mechanical properties is not accompanied by structural differences between the packings. We characterize the latter by the average numbers of contacts of each sphere $\langle Z\rangle$ and the shape isotropy $\langle \beta_0^{2,0} \rangle$ of the Voronoi cells of the particles. Additionally, we show that the number of liquid bridges per sphere $\langle B\rangle$ is approximately equal to $\langle Z\rangle + 2$, independent of the volume fraction of the packing. These findings will be helpful in guiding the development of both particle-based models and continuum mechanical descriptions of wet granular matter.

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10.1088/1367-2630/ab1517

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Weis, Simon, Gerd E Schröder-Turk and Matthias Schröter (n.d.). Structural similarity between dry and wet sphere packings. New Journal of Physics, 21(4). pp. 043020–043020. 10.1088/1367-2630/ab1517 Retrieved from https://hdl.handle.net/10161/20167.

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Schroter

Matthias Schroter

Visiting Associate Professor of DKU Studies at Duke University

I am interested in (in order of appearance): Greek philosophy, pattern formation, minimal music, granular matter, meditation, X-ray tomography, machine learning,  ....


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