Controlled Viscosity in Dense Granular Materials

We experimentally investigate the fluidization of a granular material subject to mechanical vibrations by monitoring the angular velocity of a vane suspended in the medium and driven by an external motor. On increasing the frequency, we observe a reentrant transition, as a jammed system first enters...

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Main Authors: Gnoli, A., de Arcangelis, L., Giacco, F., Lippiello, E., Ciamarra, Massimo Pica, Puglisi, A., Sarracino, A.
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2018
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Online Access:https://hdl.handle.net/10356/89219
http://hdl.handle.net/10220/44797
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-892192023-02-28T19:24:01Z Controlled Viscosity in Dense Granular Materials Gnoli, A. de Arcangelis, L. Giacco, F. Lippiello, E. Ciamarra, Massimo Pica Puglisi, A. Sarracino, A. School of Physical and Mathematical Sciences Dense Granular Materials Viscosity We experimentally investigate the fluidization of a granular material subject to mechanical vibrations by monitoring the angular velocity of a vane suspended in the medium and driven by an external motor. On increasing the frequency, we observe a reentrant transition, as a jammed system first enters a fluidized state, where the vane rotates with high constant velocity, and then returns to a frictional state, where the vane velocity is much lower. While the fluidization frequency is material independent, the viscosity recovery frequency shows a clear dependence on the material that we rationalize by relating this frequency to the balance between dissipative and inertial forces in the system. Molecular dynamics simulations well reproduce the experimental data, confirming the suggested theoretical picture. Published version 2018-05-16T04:04:59Z 2019-12-06T17:20:30Z 2018-05-16T04:04:59Z 2019-12-06T17:20:30Z 2018 Journal Article Gnoli, A., de Arcangelis, L., Giacco, F., Lippiello, E., Ciamarra, M. P., Puglisi, A., et al. (2018). Controlled Viscosity in Dense Granular Materials. Physical Review Letters, 120(13), 138001-. 0031-9007 https://hdl.handle.net/10356/89219 http://hdl.handle.net/10220/44797 10.1103/PhysRevLett.120.138001 en_US Physical Review Letters © 2018 American Physical Society. This paper was published in Physical Review Letters and is made available as an electronic reprint (preprint) with permission of American Physical Society. The published version is available at: [http://dx.doi.org/10.1103/PhysRevLett.120.138001]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. 6 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Dense Granular Materials
Viscosity
spellingShingle Dense Granular Materials
Viscosity
Gnoli, A.
de Arcangelis, L.
Giacco, F.
Lippiello, E.
Ciamarra, Massimo Pica
Puglisi, A.
Sarracino, A.
Controlled Viscosity in Dense Granular Materials
description We experimentally investigate the fluidization of a granular material subject to mechanical vibrations by monitoring the angular velocity of a vane suspended in the medium and driven by an external motor. On increasing the frequency, we observe a reentrant transition, as a jammed system first enters a fluidized state, where the vane rotates with high constant velocity, and then returns to a frictional state, where the vane velocity is much lower. While the fluidization frequency is material independent, the viscosity recovery frequency shows a clear dependence on the material that we rationalize by relating this frequency to the balance between dissipative and inertial forces in the system. Molecular dynamics simulations well reproduce the experimental data, confirming the suggested theoretical picture.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Gnoli, A.
de Arcangelis, L.
Giacco, F.
Lippiello, E.
Ciamarra, Massimo Pica
Puglisi, A.
Sarracino, A.
format Article
author Gnoli, A.
de Arcangelis, L.
Giacco, F.
Lippiello, E.
Ciamarra, Massimo Pica
Puglisi, A.
Sarracino, A.
author_sort Gnoli, A.
title Controlled Viscosity in Dense Granular Materials
title_short Controlled Viscosity in Dense Granular Materials
title_full Controlled Viscosity in Dense Granular Materials
title_fullStr Controlled Viscosity in Dense Granular Materials
title_full_unstemmed Controlled Viscosity in Dense Granular Materials
title_sort controlled viscosity in dense granular materials
publishDate 2018
url https://hdl.handle.net/10356/89219
http://hdl.handle.net/10220/44797
_version_ 1759856821500116992