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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.

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Showing 1 to 2 of 2 (0.026 seconds)

Spelling suggestions: "subject:"blasenkrebs"" "subject:"gelenkkräfte""

1

Closure relations for CFD simulation of bubble columns

Ziegenhein, Thomas, Lucas, Dirk, Rzehak, Roland, Krepper, Eckhard 28 May 2014 (has links) (PDF)
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).
Blasensäule
two-fluid-model
Mehrphasen
Blasenkräfte
Turbulenz
Bubble column
two-fluid model
bubble forces
bubble induced turbulence
ddc:620
ddc:621
ddc:660
ddc:530
Blasensäule
Numerische Strömungssimulation
Mehrphasenströmung
Verfahrenstechnik
2

Closure relations for CFD simulation of bubble columns

Ziegenhein, Thomas, Lucas, Dirk, Rzehak, Roland, Krepper, Eckhard 28 May 2014 (has links)
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).
info:eu-repo/classification/ddc/620
ddc:620
info:eu-repo/classification/ddc/621
ddc:621
info:eu-repo/classification/ddc/660
ddc:660
info:eu-repo/classification/ddc/530
ddc:530

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