The Canadian Journal of Chemical Engineering · 1973 · 100 citations · 5 references
EngineeringAerospace EngineeringPhysicsComputational Fluid DynamicsFluid DynamicsFluid MechanicsAnnular FlowExperimental Fluid MechanicsFluid PropertiesParticle-laden FlowsPneumatic SystemsUniform FlowAnnular Flow BehaviorAnnular Flow ModelingParticle Slip VelocityPneumatic Conveyance SystemsPneumatic ConveyingPneumatic Conveying SystemsPorosityTerminal Velocity
Abstract Two models for vertical pneumatic conveying, a uniform flow model at high gas velocities and an annular flow model near the particle terminal velocity, have been examined theoretically. The uniform flow model leads to the following relationship between gas and particle velocity and line porosity: No simple analytical solution was found for the annular flow model but a numerical solution was possible. Both models indicate that slip velocity may exceed the particle terminal velocity under certain conditions. The theoretical predictions agree reasonably well with experimental observations.
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