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Modeling dilute and dense granular flows in a high shear granulator

Mohammad Khalilitehrani (Institutionen för kemi- och bioteknik, Kemisk apparatteknik) ; Per Abrahamsson (Institutionen för kemi- och bioteknik, Kemisk apparatteknik) ; Anders Rasmuson (Institutionen för kemi- och bioteknik, Kemisk apparatteknik)
Powder Technology (0032-5910). Vol. 263 (2014), p. 45-49.
[Artikel, refereegranskad vetenskaplig]

This study models a high shear granulation system, including both dense and dilute regions. The dense region is modeled using an approach in which the system is treated as a visco-plastic fluid and the rheology of such a fluid is evaluated. The dilute regions are modeled by the standard Kinetic Theory of Granular Flow (KTGF). The switching between the models is accounted for by using the dimensionless inertial number, defined as the ratio shear forces/pressure forces. The results compare favorably with experimental data for a disk impeller high shear granulator. Granular temperatures and volume fractions, in particular, are well captured by the aforementioned model. The velocity profiles show better agreement with experimental data as compared to previous studies. (C) 2014 Elsevier B.V. All rights reserved.

Nyckelord: High shear granulation; Dense/dilute granular flows; Rheology; Continuum modeling; Inertial number



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Denna post skapades 2014-10-29. Senast ändrad 2015-12-17.
CPL Pubid: 205007

 

Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Kemisk apparatteknik (2005-2014)

Ämnesområden

Produktion
Strömningsmekanik
Kemiteknik

Chalmers infrastruktur

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