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1 Applied Mechanics and Engineering

1 1999

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Particle velocity, pressure and flushing phenomenon of fine powders

100%

Kuchii S. , Tomita Y.

Applied Mechanics and Engineering

1999

tom Vol. 4, no spec.

109-114

When a load is applied to a free surface of cohesive fine powder in a vessel, the powder can spout from a small orifice, which we call the flushing. This phenomenon is explained by using a gas-solid two phase flow modeling in a view of effective stress and Darcy's law, and is verified experimentally and numerically for a case when the powder in a rectangular vessel spouts from a slit by a constant piston load. It is found that near the slit there appears a high-speed region of particle of which velocity is considerably larger than that of free following due to the gravity.