Particle alignment and clustering in sheared granular materials composed of platy particles
نویسندگان
چکیده
منابع مشابه
Cohesive granular materials composed of nonconvex particles.
The macroscopic cohesion of granular materials made up of sticky particles depends on the particle shapes. We address this issue by performing contact dynamics simulations of 2D packings of nonconvex aggregates. We find that the macroscopic cohesion is strongly dependent on the strain and stress inhomogeneities developing inside the material. The largest cohesion is obtained for nearly homogene...
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This work was carried out in the framework of a larger project devoted to the micro-mechanical modeling of clayey soils by means of discrete element simulations. Here, we study the rheology and microstructure of granular media composed of platy particles. The particles are three-dimensional square plates, approximated as spheropolyhedra. Several samples composed of particles of different levels...
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We investigate the shear-induced structure formation of colloidal particles dissolved in non-Newtonian fluids by means of computer simulations. The two investigated visco-elastic fluids are a semi-dilute polymer solution and a worm-like micellar solution. Both shear-thinning fluids contain long flexible chains whose entanglements appear and disappear continually as a result of Brownian motion a...
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The particle dynamics and shear forces of granular matter in a Couette geometry are determined experimentally. The normalized tangential velocity V(y) declines strongly with distance y from the moving wall, independent of the shear rate and of the shear dynamics. Local rms velocity fluctuations deltaV(y) scale with the local velocity gradient to the power 0.4+/-0.05. These results agree with a ...
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Experiments on continuously sheared granular materials (glass spheres) with diameters 1.0 # d # 5 mm show large fluctuations in the normal stress, sstd. Experiments are carried out in an annular Couette geometry for rotation rates 0.003 , Ù u , 1 radys. Power spectra from sstd, Psvd, show rate invariance in the fluctuations: Ù uPsvd is a function only of vy Ù u, independent of Ù u. Ù uPsvd depe...
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ژورنال
عنوان ژورنال: The European Physical Journal E
سال: 2014
ISSN: 1292-8941,1292-895X
DOI: 10.1140/epje/i2014-14116-0