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Numerical modelling of gas-solid fluidized beds using the two-fluid approach. (English) Zbl 0991.76087
Summary: This paper details an approach to modelling gas-solid fluidized beds using the two-fluid granular temperature model. Details concerning the difficulties associated with boundary conditions, particularly for curved boundaries, are described along with a novel means of obtaining the internal stress of solid phase, in part, by solving an implicit equation. This results in a scheme that is stable even when the solid volume fraction is close to maximum packing. A transient mixed finite element discretization is used to solve the multi-phase equations with a discontinuous finite element representation of the granular temperature and continuity equations. A new solution method is proposed to solve the coupled momentum and continuity equations based on Arnoldi iteration. Two fluidized beds are modelled, one in the bubbling regime and the other in the slugging regime. These simulations are compared with experiments.

MSC:
76T15 Dusty-gas two-phase flows
76T25 Granular flows
76M10 Finite element methods applied to problems in fluid mechanics
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