Hydrodynamic modelling of dense gas-fluidised beds using the kinetic theory of granular flow: effect of coefficient of restitution on bed dynamics

A two-dimensional multi-fluid Eulerian CFD model with closure laws according to the kinetic theory of granular flow has been applied to study the influence of the coefficient of restitution on the hydrodynamics of dense gas-fluidised beds. It is demonstrated that hydrodynamics of dense gas-fluidised...

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Bibliographic Details
Published in:Chemical engineering science 2001, Vol.56 (2), p.571-578
Main Authors: Goldschmidt, M.J.V., Kuipers, J.A.M., van Swaaij, W.P.M.
Format: Article
Language:English
Subjects:
Applied sciences
Chemical engineering
Exact sciences and technology
Fluidisation
Fluidization
Kinetic theory of granular flow
Multi-fluid model
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Summary:A two-dimensional multi-fluid Eulerian CFD model with closure laws according to the kinetic theory of granular flow has been applied to study the influence of the coefficient of restitution on the hydrodynamics of dense gas-fluidised beds. It is demonstrated that hydrodynamics of dense gas-fluidised beds (i.e. gas bubbles behaviour) strongly depend on the amount of energy dissipated in particle–particle encounters. It is concluded that, in order to obtain realistic bed dynamics from fundamental hydrodynamic models, it is of prime importance to correctly take the effect of energy dissipation due to non-ideal particle–particle encounters into account.
ISSN:0009-2509
1873-4405
DOI:10.1016/S0009-2509(00)00262-1