Buscar
Mostrando ítems 1-10 de 33
Artículo
Correlation between bulk stresses and interparticle contact forces in fine powders
(American Physical Society, 2001)
We present measurements of the tensile strength as a function of the consolidation stress for a set of fine cohesive powders ~xerographic toners! of 12.7 mm particle size and with a range of concentration of submicron fumed ...
Artículo
The settling of fine cohesive powders
(IOP Publishing Ltd., 2001-05-01)
We investigate the settling of an initially fluidized bed of a fine cohesive powder. Experimental results on the sedimentation rate cannot be fitted by theoretical and empirical equations existing in the literature and ...
Artículo
Granular avalanches: Deterministic, correlated and decorrelated dynamics
(IOP Publishing Ltd., 2004-12-15)
A statistical analysis of granular avalanches in a half-filled and slowly rotated drum is presented. For large-sized grains the classical coherent oscillation is reproduced, i.e. we observe a quasi-periodic succession of ...
Artículo
Avalanches in fine, cohesive powders
(American Physical Society, 2000)
We have investigated the onset of avalanches in fine, cohesive granular materials. In our experiments shear stress is generated by tilting an initialized bed of powder and increasing the angle of tilt until the powder ...
Artículo
Fine cohesive powders in rotating drums: Transition from rigid-plastic flow to gas-fluidized regime
(American Physical Society, 2002)
We investigate the dynamics of fine cohesive powders inside rotating drums. We show that these powders may be fluidized due to entrapment of ambient gas, and we determine the onset of fluidization. Experimental measurements ...
Artículo
Aggregation and sedimentation in gas-fluidized beds of cohesive powders
(American Physical Society, 2001)
We present measurements on the settling velocity of gas-fluidized beds of fine cohesive powders. In the solidlike regime ~solid volume fraction f.fc) particles are static, sustained by enduring contacts. The settling is ...
Artículo
Rheology of magnetofluidized fine powders
(2010)
Usually a bed of solid particles °uidized by a gas is inherently unstable. Gas bubbles are rapidly formed at the onset of °uidization, which hinders the e±ciency of gas-solid contact. In the case of magnetizable particles, ...
Artículo
Numerical analysis of the stability of the Electrohydrodynamic (EHD) electroconvection between two plates
(IOP Publishing, 2008)
The time evolution of the problem of Electrohydrodynamic (EHD) convection in a liquid between two plates is analysed numerically. The equations are nondimensionalized using the ion drift velocity and the viscous time ...
Artículo
Molecular dynamics simulations of homogeneous solids using multi-layered structures
(IOP Publishing Ltd., 2008-07)
The main goal of this work is to model a homogeneous computer material with well-defined mechanical properties. To carry out the model material, an internal structure arranged in layers with different atom sizes is implemented ...
Artículo
Jamming Threshold of Dry Fine Powders
(American Physical Society, 2004)
We report a novel experimental study on the jamming transition of dry fine powders with controlled attractive energy and particle size. Like in attractive colloids dry fine particles experience diffusionlimited clustering ...