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Mostrando ítems 11-20 de 33
Artículo
Looking for Self-Organized Critical Behavior in Avalanches of Slightly Cohesive Powders
(American Physical Society, 2001)
We report results from a statistical analysis of avalanches of cohesive powders in a slowly rotated drum. Interparticle adhesion, which diminishes the effect of inertia and whose magnitude strongly fluctuates in a local ...
Artículo
Electromechanics of fluidized beds of nanoparticles
(American Physical Society, 2009)
The electromechanical behavior of a gas-fluidized bed of insulating silica nanoparticles is investigated. When fluidized by gas, these nanoparticles form highly porous agglomerates of size of the order of hundreds of ...
Artículo
Magnetofluidization of fine magnetite powder
(American Physical Society, 2009)
The behavior of a fluidized bed of fine magnetite particles as affected by a cross-flow magnetic field is investigated. A distinct feature of this naturally cohesive powder, as compared to noncohesive magnetic grains usually ...
Artículo
Numerical simulation of EHD flows using Discontinuous Galerkin Finite Element methods
(Elsevier, 2013)
The aim of this paper is to explore the capability of Discontinuous Galerkin Finite Element methods to solve numerically the charge transport equation in EHD convective flows, in both strong and weak injection regimes. ...
Artículo
Effect of vibration on the stability of a gas-fluidized bed of fine powder
(American Physical Society, 2001)
We have investigated the effect of vibrations on the stability of gas-fluidized beds of fine powders (particle size ~10 mm). The powder is uniformly fluidized by an adjustable gas flow that enables us to control the average ...
Artículo
Types of gas fluidization of cohesive granular materials
(American Physical Society, 2007)
Some years ago it was shown that gas-fluidized powders may transit from solidlike to fluidlike fluidization prior to bubbling, shedding light on a long-standing controversy on the nature of “homogeneous” fluidization. In ...
Artículo
The Sevilla Powder Tester: A Tool for Characterizing the Physical Properties of Fine Cohesive Powders at Very Small Consolidations
(Hosokawa Powder Technology Foundation, 2004)
We present a fluidized bed apparatus that enables us to test the bulk mechanical properties such as the yield stresses and compressibility of fine cohesive powders. Every measurement is preceded by driving the powder ...
Artículo
Effect of compaction history on the fluidization behavior of fine cohesive powders
(American Physical Society, 2006)
Fine particles agglomerate in the fluidized state due to the strength of interparticle attractive forces as compared to particle weight. Interparticle adhesion can be largely increased by consolidation stresses applied ...
Artículo
Magnetic field induced inversion in the effect of particle size on powder cohesiveness
(AIP Publishing, 2010-07)
Experimental measurements are reported on the tensile yield stress of magnetofluidized beds of fine magnetic powders operated in the cross-flow configuration. In the absence of externally applied magnetic field the yield ...
Artículo
An automated apparatus for measuring the tensile strength and compressibility of fine cohesive powders
(American Institute of Physics, 2000)
This paper describes an apparatus based on a novel use of a powder bed, whereby the relationship between consolidation stress, tensile strength, and free volume of fine powder is measured. The powder to be tested is first ...