Column to pile transition in quasi-static deposition of granular chains

Sarate, PS and Murthy, TG and Sharma, P (2022) Column to pile transition in quasi-static deposition of granular chains. In: Soft Matter, 18 (10). pp. 2054-2059.

	PDF sof_mat_18-10_2054-2059_2022.pdf - Published Version Restricted to Registered users only Download (4MB) | Request a copy
	Video (AVI) Supplimentary_sof_mat_18-10_2054-2059_2022_1.avi - Published Supplemental Material Download (10MB)
	Video (AVI) Supplimentary_sof_mat_18-10_2054-2059_2022_2.avi - Published Supplemental Material Download (11MB)
	Video (AVI) Supplimentary_sof_mat_18-10_2054-2059_2022_3.avi - Published Supplemental Material Download (11MB)
	Video (AVI) Supplimentary_sof_mat_18-10_2054-2059_2022_4.avi - Published Supplemental Material Download (10MB)
	Video (AVI) Supplimentary_sof_mat_18-10_2054-2059_2022_5.avi - Published Supplemental Material Download (9MB)
	Video (AVI) Supplimentary_sof_mat_18-10_2054-2059_2022_6.avi - Published Supplemental Material Download (10MB)
Preview	PDF Supplimentary_sof_mat_18-10_2054-2059_2022_7.pdf - Published Supplemental Material Download (144kB) | Preview

Abstract

The repose angle is a key geometric property that characterises the inter-particle friction and thereby granular flows. One of the common methods to measure this property is to deposit a pile by extracting a pre-filled cylinder and letting the material flow out. While the repose angle of spherical beads is insensitive to the aspect ratio of this pre-filled column, we find that long flexible granular chains show a remarkable transition from stable vertical columns to conical piles depending on the aspect ratio. Below a critical aspect ratio, the cessation of flow of granular chains due to inter-chain entanglement stabilises the columns, while above the critical aspect ratio the conical piles of long granular chains arise not out of shear flow but instead through a series of column collapse instabilities during the deposition process. We also identify the critical chain length below which the granular chains flow and behave similar to spherical particles.

Item Type:	Journal Article
Publication:	Soft Matter
Publisher:	Royal Society of Chemistry
Additional Information:	The copyright for this article belongs to Royal Society of Chemistry.
Keywords:	Aspect ratio; Deposition; Granular materials; Particles (particulate matter); Shear flow, Aspect-ratio; Critical aspect ratio; Flow out; Geometric properties; Granular chains; Granular flows; Material Flow; Quasi-static; Repose angles, Piles
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Biosystems Science and Engineering Division of Mechanical Sciences > Civil Engineering Division of Physical & Mathematical Sciences > Physics
Date Deposited:	24 Jun 2022 12:02
Last Modified:	24 Jun 2022 12:02
URI:	https://eprints.iisc.ac.in/id/eprint/73867

Actions (login required)

View Item