Understanding Segregation And Mixing Effects
In A Riser Using The Quadrature Method
Of Moments
Author(s)
A. Dutta, J. Raeckelboom, G. J. Heynderickx & G. B. Marin
Abstract
Segregation and mixing effects of particle diameter distributions are numerically
investigated in the riser section of a circulating fluidized bed. A granular kinetic
theory based approach, which implements the Eulerian quadrature-based
moment method to describe the particle phase, is coupled to an Eulerian
multi-fluid solver through a population balance model. The gas-solid multiphase
flow is two-dimensional, transient and isothermal. The particle distributions fed
from each side inlet of the riser have different variances, but the same mean
diameter. The core-annular regime used as a numerical benchmark for riser flows
is well predicted. A comparison in the homogeneity of particle mixing is made
from the lower-order moments of the particle distribution obtained at various
positions and at different axial lengths along the riser. It is seen that the relative
standard deviation of the particle distribution varies spatially, indicating dynamic
mixing inside the riser.
Keywords: mixing, riser, multiphase, quadrature method of moments.
Keywords
mixing, riser, multiphase, quadrature method of moments
Related Book
Other papers in this volume
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