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Now showing items 11-20 of 22
Article
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 ...
Article
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 ...
Article
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 ...
Article
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 ...
Article
Fluid to solid transition in magnetofluidized beds of fine powders
(AIP Publishing, 2010)
Experimental observations on the fluid to solid transition in beds of magnetized fine particles fluidized by gas are reported for different particle sizes dp. Contrarily to stability analysis prediction, the fluidized ...
Article
Physics of Compaction of Fine Cohesive Particles
(American Physical Society, 2005)
Fluidized fractal clusters of fine particles display critical-like dynamics at the jamming transition, characterized by a power law relating consolidation stress with volume fraction increment. At a critical stress clusters ...
Article
Nanofluidization electrostatics
(American Physical Society, 2008)
Electrostatic charging of powders is a relevant phenomenon for a number of industrial applications. The design of new processes and the use of high resistivity materials and ultrafine powders may lead to higher charging ...
Article
Effect of particle size and interparticle force on the fluidization behavior of gas-fluidized beds
(American Physical Society, 2003)
Gas-fluidized powders of fine particles display a fluidlike regime in which the bed does not have a yield strength, it expands uniformly as the gas velocity is increased and macroscopic bubbles are absent. In this paper ...
Article
Magnetic stabilization of fluidized beds: Effect of magnetic field orientation
(Elsevier, 2017)
Fluidized beds of granular materials can be stabilized by interparticle attractive forces which confer the expanded bed an elastic modulus that stabilizes it against flow perturbations. Stabilization in a structure of ...
Article
Cohesion and Internal Friction of Fine Glass Beads as Affected by Small Intensity Vertical Vibration
(2009)
We have used a novel centrifuge powder tester to obtain the angle of internal friction and cohesion of fine glass beads as affected by previous vibration in the vertical direction. In the experimental procedure we use a ...