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Additive rheology of complex granular flows
- Source :
- Nature Communications, Nature Communications, Nature Publishing Group, 2020, 11 (1), ⟨10.1038/s41467-020-15263-3⟩, Nature Communications (2041-1723) (Nature Research), 2020-03, Vol. 11, N. 1, P. 1476 (8p.), Nature Communications, Vol 11, Iss 1, Pp 1-8 (2020)
- Publication Year :
- 2020
- Publisher :
- HAL CCSD, 2020.
-
Abstract
- Granular flows are omnipresent in nature and industrial processes, but their rheological properties such as apparent friction and packing fraction are still elusive when inertial, cohesive and viscous interactions occur between particles in addition to frictional and elastic forces. Here we report on extensive particle dynamics simulations of such complex flows for a model granular system composed of perfectly rigid particles. We show that, when the apparent friction and packing fraction are normalized by their cohesion-dependent quasistatic values, they are governed by a single dimensionless number that, by virtue of stress additivity, accounts for all interactions. We also find that this dimensionless parameter, as a generalized inertial number, describes the texture variables such as the bond network connectivity and anisotropy. Encompassing various stress sources, this unified framework considerably simplifies and extends the modeling scope for granular dynamics, with potential applications to powder technology and natural flows.<br />Granular materials are abundant in nature, but we haven’t fully understood their rheological properties as complex interactions between particles are involved. Here, Vo et al. show that granular flows can be described by a generalized dimensionless number based on stress additivity.
- Subjects :
- Inertial frame of reference
Materials science
Science
General Physics and Astronomy
Atomic packing factor
01 natural sciences
Texture (geology)
General Biochemistry, Genetics and Molecular Biology
Article
010305 fluids & plasmas
Stress (mechanics)
Physics::Fluid Dynamics
Rheology
0103 physical sciences
[SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph]
Civil engineering
Colloids
lcsh:Science
010306 general physics
Anisotropy
Multidisciplinary
Process chemistry
Physics
[SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph]
General Chemistry
Mechanics
Condensed Matter::Soft Condensed Matter
lcsh:Q
Quasistatic process
Dimensionless quantity
Subjects
Details
- Language :
- English
- ISSN :
- 20411723
- Database :
- OpenAIRE
- Journal :
- Nature Communications, Nature Communications, Nature Publishing Group, 2020, 11 (1), ⟨10.1038/s41467-020-15263-3⟩, Nature Communications (2041-1723) (Nature Research), 2020-03, Vol. 11, N. 1, P. 1476 (8p.), Nature Communications, Vol 11, Iss 1, Pp 1-8 (2020)
- Accession number :
- edsair.doi.dedup.....7ef927c7417856c7383176a29b71d464