Contact

Dr. Dirk Lucas
Head Computational Fluid Dynamics
d.lucasAthzdr.de
Phone: +49 351 260 - 2047
Fax: +49 351 260 - 12047

Computational Fluid Dynamics

Im Focus der Arbeiten der CFD-Abteilung stehen:

  • Die Entwicklung und Validierung von CFD-Modellen für Mehrphasenströmungen
    • Für industrielle Anwendungen auf mittleren und großen Skalen
    • auf der Basis des Mehr-Fluid Euler-Euler-Ansatzes.
  • Dedizierte Experimente und DNS / LES für die Entwicklung und Validierung von Schließungsmodellen.

Stichworte

AIAD, Baseline-Modelle, Blasen-induzierte Turbulenz, Blasenströmungen in Flüssigmetallen, Brennelementlagerbecken, chemische Reaktionen, dichtegetriebene Strömungen, Dreiphasenströmungen, Experimente, Flashing, Flotation, GENTOP, iClass, iMUSIG, Klimaanlagen, Koaleszenz, Kondensation, Konferenz, kritischer Wärmestrom, Kurzlehrgang, OpenFOAM, Phasenübergang, polydisperse Blasenströmungen, rotierende Strömungen, Sieden, Strömungen in Brennelementbündeln, Transport von Isolationsmaterialien, Verdampfung, Verteilerrohre, vertikale Rohrströmungen, Wandsieden, Zerfall

Forschung

Foto: cfd - motivation ©Copyright: Dr. Dirk Lucas

Motivation and Strategy

The qualification of multiphase CFD-models in frame of the multi-fluid approach requires some consolidation. For the extension of the applicability new concepts are established.
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Foto: Baseline-Modell für polydisperse Blasenströmungen - iMUSIG - refpic ©Copyright: Dr. Yixiang Liao

Baseline-Modell für polydisperse Blasenströmungen – iMUSIG

One focus of the ongoing activities is the further development of the baseline model for poly-disperse bubbly flows. The inhomogeneous MUSIG model (iMUSIG) provides a suitable modelling framework while the closure models including all ­parameters are well defined.
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Foto: HOTLEG CFD ©Copyright: Dr. Thomas Höhne

Baseline model for se­parated flows – AIAD

Se­parated flows, i.e. flow with large gas-liquid-interfaces occur frequently in horizontal flow domains (stratification), but are also observed in other configurations as e.g. annular flow in ­vertical pipes.
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Foto: GENTOP WALL BOILING Example ©Copyright: Dr. Thomas Höhne

GENeralized TwO-Phase flow concept – GENTOP

In many gas-liquid flows with relevance for applications different morpho­logies of the interfacial structure (disperse or segregated) occur in ­parallel and transitions between these morpho­logies have to be considered. The innovative GENTOP-concept is a good basis for the simulation of such flows.
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Foto: OpenFoam Keyboard ©Copyright: Dr. Fabian Schlegel

Modelling of Multiphase Flows with OpenFOAM

Within this project the main developments for the numerical simulation of multiphase flows at Helmholtz-Zentrum Dresden-Rossendorf are transferred to the C++ library OpenFOAM. The complete access to the source code, in contrast to commercial CFD software, give rise to much more possibilities concerning the development of new physical models and simulation methods.
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Foto: CFD Simulation von TOPFLOW-PTS Dampf/Wasser Experiment, Temperaturverteilung und Wasserströmungslinien ©Copyright: Pavel Apanasevich

Applications and projects

Our activities aim on the qualification of multiphase CFD-methods as a tool for the optimization of industrial ap­paratuses and processes as well for safety analyses. Some examples for applications and projects are given here.
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Contact

Dr. Dirk Lucas
Head Computational Fluid Dynamics
d.lucasAthzdr.de
Phone: +49 351 260 - 2047
Fax: +49 351 260 - 12047