Dr. Roland Rzehak

Head Flotation and reactive multiphase flows
Phone: +49 351 260 3475

Dr. Dirk Lucas

Head Computational Fluid Dynamics
Phone: +49 351 260 2047

HZDR baseline model for poly-disperse bubbly flows

The baseline model was developed for bubbly flow with bubble sizes larger 1 mm and validated for many cases.

Depending on the expected bubble size distribution a decision has to be done whether a mono-disperse approach is sufficient or a polydisperse approach (iMUSIG) has to be used. The definition of the closure models and constants used in the present baseline model version can be downloaded here.

Examples for the validation can be found here.

Selected publications

Liao, Y.; Ma, T.; Liu, L.; Ziegenhein, T.; Krepper, E.; Lucas, D.
Eulerian modeling of turbulent bubbly flow based on a baseline closure concept.
The 17th International Topical Meeting on Nuclear Reactor Thermal Hydraulics (NURETH-17), Sept. 3-8, 2017, Xi’an, Shaanxi, China

Rzehak, R.; Ziegenhein, T.; Kriebitzsch, S.; Krepper, E.; Lucas, D.
Unified Modeling of Bubbly Flows in Pipes, Bubble Columns, and airlift columns.
Chemical Engineering Science 157, 147-158

Lucas, D.; Rzehak, R.; Krepper, E.; Ziegenhein, T.; Liao, Y.; Kriebitzsch, S.; Apanasevich, P.
A Strategy for the Qualification of Multi-Fluid Approaches for Nuclear Reactor Safety.
Nuclear Engineering and Design 299, 2-11

Lucas, D., Krepper, E., Rzehak, R., Liao, Y., et al.
Status and challenges of CFD-modelling for poly-disperse bubbly flows.
The 16th International Topical Meeting on Nuclear Reactor Thermal Hydraulics (NURETH-16), Chicago, USA, Aug. 30 –Sept. 09

Liao, Y.; Rzehak, R.; Lucas, D.; Krepper, E.
Baseline Closure Model for Dispersed bubbly flow: Bubble Coalescence and Breakup.
Chemical Engineering Science 122, 336-349

Rzehak, R.; Krepper, E.; Liao, Y.; Ziegenhein, T.; Kriebitzsch, S.; Lucas, D.
Baseline model for the simulation of bubbly flows.
Chemical Engineering Technology 38, 1972-1978