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Journal Articles AIChE Journal Year : 2010

Modeling heterogeneous downward dense gas-particle flows

Abstract

A novel approach is proposed to model heterogeneous downward dense gas-particle flows. The homogeneous behavior of the flow is described by the mass and momentum transport equations of the gas and particulate phases solved using a mono-dimension finite volume method on staggered grids. The heterogeneous features of the flow are predicted simultaneously using the bubble-emulsion formalism. The gas compressibility is taken into consideration. The model is supplemented with a new correlation to account for the wall-particle frictional effects. The predictions are compared with the vertical profiles of pressure and the amount of gas that flows up and down two standpipes and a cyclone dipleg of an industrial fluid catalytic cracking unit and of a cold small-scale circulating fluidized bed. The trends are well predicted. The model gives further information and is thus an innovative starting point for downward dense gas-particle flow hydrodynamics investigation.
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Dates and versions

hal-03474316 , version 1 (10-12-2021)

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Régis Andreux, Mehrdji Hemati. Modeling heterogeneous downward dense gas-particle flows. AIChE Journal, 2010, 56 (5), pp.1163-1172. ⟨10.1002/AIC.12049⟩. ⟨hal-03474316⟩
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