A bubbling fluidization model using kinetic theory of granular flow

AICHE Journal - Tập 36 Số 4 - Trang 523-538 - 1990
Jianmin Ding1, Dimitri Gidaspow1
1Department of Chemical Engineering, Illinois Institute of Technology, Chicago, IL 606 16

Tóm tắt

AbstractDetailed knowledge of solids circulation, bubble motion, and frequencies of porosity oscillations is needed for a better understanding of tube erosion in fluidized bed combustors. A predictive two‐phase flow model was derived starting with the Boltzman equation for velocity distribution of particles. The model is a generalization of the Navier‐Stokes equations of the type proposed by R. Jackson, except that the solids viscosities and stresses are computed by simultaneously solving a fluctuating energy equation for the particulate phase. The model predictions agree with time‐averaged and instantaneous porosities measured in two‐dimensional fluidized beds. Observed flow patterns and bubbles were also predicted.

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AICHE Journal

Tập 36 Số 4

523-538

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