scholarly journals The unusual problem of upscaling isostaticity theory for granular matter

2020 ◽  
Vol 22 (2) ◽  
Author(s):  
Raphael Blumenfeld
Keyword(s):  
Granular Matter ◽  
Unusual Problem

scholarly journals Continuously Sheared Granular Matter Reproduces in Detail Seismicity Laws

2019 ◽  
Vol 122 (21) ◽  
Author(s):  
S. Lherminier ◽  
R. Planet ◽  
V. Levy dit Vehel ◽  
G. Simon ◽  
L. Vanel ◽  
...  
Keyword(s):  
Granular Matter

scholarly journals Un-jamming due to energetic instability: statics to dynamics

2021 ◽  
Vol 23 (4) ◽  
Author(s):  
Stefan Luding ◽  
Yimin Jiang ◽  
Mario Liu
Keyword(s):  
Granular Matter ◽  
Numerical Data ◽  
Soft Materials ◽  
Material Point ◽  
Solid States ◽  
Granular Gas ◽  
Granular Solid Hydrodynamics ◽  
Particle Simulations ◽  
Points Of View ◽  
Deformation Modes

Abstract Jamming/un-jamming, the transition between solid- and fluid-like behavior in granular matter, is an ubiquitous phenomenon in need of a sound understanding. As argued here, in addition to the usual un-jamming by vanishing pressure due to a decrease of density, there is also yield (plastic rearrangements and un-jamming that occur) if, e.g., for given pressure, the shear stress becomes too large. Similar to the van der Waals transition between vapor and water, or the critical current in superconductors, we believe that one mechanism causing yield is by the loss of the energy’s convexity (causing irreversible re-arrangements of the micro-structure, either locally or globally). We focus on this mechanism in the context of granular solid hydrodynamics (GSH), generalized for very soft materials, i.e., large elastic deformations, employing it in an over-simplified (bottom-up) fashion by setting as many parameters as possible to constant. Also, we complemented/completed GSH by using various insights/observations from particle simulations and calibrating some of the theoretical parameters—both continuum and particle points of view are reviewed in the context of the research developments during the last few years. Any other energy-based elastic-plastic theory that is properly calibrated (top-down), by experimental or numerical data, would describe granular solids. But only if it would cover granular gas, fluid, and solid states simultaneously (as GSH does) could it follow the system transitions and evolution through all states into un-jammed, possibly dynamic/collisional states—and back to elastically stable ones. We show how the un-jamming dynamics starts off, unfolds, develops, and ends. We follow the system through various deformation modes: transitions, yielding, un-jamming and jamming, both analytically and numerically and bring together the material point continuum model with particle simulations, quantitatively. Graphic abstract

scholarly journals Effect of viscosity on the avalanche dynamics and flow transition of wet granular matter

Particuology ◽  
2021 ◽  
Author(s):  
Jens H. Kasper ◽  
Vanessa Magnanimo ◽  
Sjoerd D.M. de Jong ◽  
Arjan Beek ◽  
Ahmed Jarray
Keyword(s):  
Granular Matter ◽  
Flow Transition ◽  
Avalanche Dynamics

scholarly journals Granular matter under microgravity

2008 ◽  
Vol 39 (4) ◽  
pp. 28-30
Author(s):  
P. Evesque ◽  
Y. Garrabos ◽  
A. Garcimartin ◽  
N. Vandewalle ◽  
D. Beysens
Keyword(s):  
Granular Matter

scholarly journals Segregation in granular matter under horizontal swirling excitation

2001 ◽  
Vol 64 (4) ◽  
Author(s):  
S. Aumaître ◽  
C. A. Kruelle ◽  
I. Rehberg
Keyword(s):  
Granular Matter

Vibration separation of multiple mixed particle curves based on image recognition and machine learning

2021 ◽  
pp. 1-13
Author(s):  
Zhou Yanyan
Keyword(s):  
Particle Physics ◽  
Granular Matter ◽  
Particle Separation ◽  
Internal Force ◽  
Research Field ◽  
Systematic Research ◽  
Gradual Improvement ◽  
System A ◽  
Combined Action ◽  
Motion Characteristics

The motion characteristics of particulate matter are very wonderful. With the development of science and technology, the motion of granular materials has gradually become a hot topic, which has attracted the attention of many scientists and experts. The research of granular matter has gradually become specialized and systematic. With the gradual improvement of the system, a frontier research field particle physics has been formed. Under the combined action of external force and internal force, particles can reflect the properties of fluid, but in the process of flow, it will show different size separation phenomenon from the fluid. The problem of particle separation was formally introduced into the field of physics in 1987. In reality, the existence of particles is not unique. In view of this, the author makes a systematic research and Analysis on the behavior and factors of vibration.

Turbulent-like velocity fluctuations in two-dimensional granular materials subject to cyclic shear

Soft Matter ◽  
2022 ◽  
Author(s):  
Aile Sun ◽  
Yinqiao Wang ◽  
Yangrui Chen ◽  
Jin Shang ◽  
Jie Zheng ◽  
...  
Keyword(s):  
Experimental Study ◽  
Granular Materials ◽  
Granular Matter ◽  
Two Dimensional ◽  
Friction Coefficients ◽  
Velocity Fluctuations ◽  
Cyclic Shear

We perform a systematic experimental study to investigate the velocity fluctuations in the two-dimensional granular matter of low and high friction coefficients subjected to cyclic shear of a range of...

scholarly journals Evolution of force networks in dense granular matter close to jamming

2017 ◽  
Vol 140 ◽  
pp. 15014 ◽  
Author(s):  
Lou Kondic ◽  
Miroslav Kramár ◽  
Lenka Kovalčinová ◽  
Konstanin Mischaikow
Keyword(s):  
Granular Matter ◽  
Force Networks
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