Simon Schneiderbauer, Stefan Pirker,
"A frictional-kinetic model for dilute to dense gas-particle flows"
, in Eberhardsteiner, J. and Böhm, H. J. and Rammerstorfer, F. G.: CD-ROM Proceedings of the 6th European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2012), Vienna University of Technology, Austria, Vienna, Austria, 9-2012
Original Titel:
A frictional-kinetic model for dilute to dense gas-particle flows
Sprache des Titels:
Englisch
Original Buchtitel:
CD-ROM Proceedings of the 6th European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2012)
Original Kurzfassung:
Due to increasing computer power the numerical simulation of fluidized and moving beds has become feasible. While kinetic theory based CFD (Computational Fluid Dynamics) has become a valuable design tool for modeling industrial scale fluidized bed reactors, state- of-the-art models fail to predict the mass flow rates from hoppers and moving beds correctly. We present a comprehensive frictional-kinetic rheological CFD for the continuum modeling of kinetic, collisional and frictional regimes in fluidized and moving beds. In addition to a µ(I)- rheology, where I denotes the ratio between the macroscopic deformation timescale and the inertial timescale, a dilation law is established in the frictional regime. Results for a spout pseudo-2D bed and of a bin discharge are presented. It is shown that the comprehensive frictional-kinetic model suitably predicts on the one hand, the mass flow rate from a rectan- gular bin and on the other hand, the time averaged solids velocity profiles in a spout pseudo-2D fluidized bed when compared with measurements.
Sprache der Kurzfassung:
Englisch
Englische Kurzfassung:
Due to increasing computer power the numerical simulation of fluidized and moving beds has become feasible. While kinetic theory based CFD (Computational Fluid Dynamics) has become a valuable design tool for modeling industrial scale fluidized bed reactors, state- of-the-art models fail to predict the mass flow rates from hoppers and moving beds correctly. We present a comprehensive frictional-kinetic rheological CFD for the continuum modeling of kinetic, collisional and frictional regimes in fluidized and moving beds. In addition to a µ(I)- rheology, where I denotes the ratio between the macroscopic deformation timescale and the inertial timescale, a dilation law is established in the frictional regime. Results for a spout pseudo-2D bed and of a bin discharge are presented. It is shown that the comprehensive frictional-kinetic model suitably predicts on the one hand, the mass flow rate from a rectan- gular bin and on the other hand, the time averaged solids velocity profiles in a spout pseudo-2D fluidized bed when compared with measurements.
Forschungs-