hzdr
Closure relations for CFD simulation of bubble columns
2014-05-28
[Electronic ed.]
Helmholtz-Zentrum Dresden-Rossendorf
prv
edt
Helmholtz-Zentrum Dresden-Rossendorf, Dresden
Institute of Fluid Dynamics
Computational Fluid Dynamics
male
Jena
male
male
male
This paper describes the modelling of bubbly flow in a bubble column considering non-drag forces, polydispersity and bubble induced turbulence using the Eulerian two-fluid approach. The set of used closure models describing the momentum exchange between the phases was chosen on basis of broad experiences in modelling bubbly flows at the Helmholtz-Zentrum Dresden-Rossendorf. Polydispersity is modeled using the inhomogeneous multiple size group (iMUSIG) model, which was developed by ANSYS/CFX and Helmholtz-Zentrum Dresden-Rossendorf. Through the importance of a comprehensive turbulence modeling for coalescence and break-up models, bubble induced turbulence models are investigated. A baseline has been used which was chosen on the basis of our previous work without any adjustments. Several variants taken from the literature are shown for comparison. Transient CFD simulations are compared with the experimental measurements and Large Eddy Simulations of Akbar et al. (2012).
620, 621, 660, 530
Blasensäule, Numerische Strömungssimulation, Mehrphasenströmung, Verfahrenstechnik
Blasensäule, two-fluid-model, Mehrphasen, Blasenkräfte, Turbulenz
Bubble column, two-fluid model, bubble forces, bubble induced turbulence
urn:nbn:de:bsz:d120-qucosa-144231
ICMF 2013
pbl
ICMF 2013, Jeju
Thomas
Ziegenhein
1986-03-28
aut
Dirk
Lucas
Dr.
aut
Roland
Rzehak
Dr.
aut
Eckhard
Krepper
Dr.
aut
eng
8th International Conference on Multiphase Flow - ICMF 2014, Jeju, Korea, May 26-31, 2013
born digital
Thomas Ziegenhein
t.ziegenhein@hzdr.de
in_proceeding