Fine particle deposition to porous beds

modeling of controlled particle deposition on to electronically conducting surfaces

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Coating of meso-porous metallic membranes with oriented channel-like fine pores by pulsed laser deposition.

There is increasing demand to functionalize meso- and nanoporous materials by coating and make the porous substrate biocompatible or environmentally friendly. However, coating on a meso-porous substrate poses great challenges, especially if the pore aspect ratio is high. We adopted the pulsed laser deposition (PLD) method to coat Ni(3)Al-based meso-porous membranes, which were fabricated from a...

Particle pressures in gas-fluidized beds

The particle pressure is the surface force that is exerted due to the motion of particles and their interactions. This paper describes measurements of the particle pressure exerted on the sidewall of a gas-fluidized bed. As long as the bed remains in a packed state, the particle pressure decreases with increasing gas velocity as progressively more of the bed is supported by fluid forces. It app...

Simulation and Experimental Investigation of the Permeability Reduction due to Asphaltene Deposition in Porous Media

Airborne particle deposition in cleanrooms: Deposition mechanisms

This article discusses the mechanisms of particle deposition onto cleanroom surfaces. The main mechanism for particles above about 0.5μm is gravitational settling. Turbulent deposition and electrostatic attraction can also occur at all particle sizes, and for particles below 0.5μm Brownian diffusion is important. Measurements of particle deposition rates (PDRs) were made of particles 10μm on wi...