rheology of wet granular materials under continuous shear: experiments and simulations
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2017
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Abstract
The behaviour of wet granular media in shear flow is characterized by the dependence of apparent friction μ* and solid fraction Φs on the reduced pressure P* and the inertia number I. Reduced pressure, P* = σ22a2/F0, compares the applied normal stress σ22 on grains of diameter a to the tensile strength of contact F0 (proportional to the surface tension Г of the liquid and the beads diameter). A specifically modified rotational rheometer is used to characterize the response of model wet granular material to applied shear rate γ˙$\dot \gamma $ under controlled normal stress σ22. Discrete Element Method (DEM) simulations in 3D are carried out in parallel and numerical results are compared with experimental ones. Cohesive, inertia, saturation and viscous effects on macroscopic coefficient of friction μ* and solid fraction Φs are discussed.
| Reference Key |
michel2017epjrheology
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|---|---|
| Authors | ;Badetti Michel;Fall Abdoulaye;Roux Jean-Noël |
| Journal | utilitas mathematica |
| Year | 2017 |
| DOI |
10.1051/epjconf/201714008019
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