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A VOF-based method for the simulation of gas bubbles influenced by surfactants

Alke, A. ; Bothe, D. :
A VOF-based method for the simulation of gas bubbles influenced by surfactants.
In: 7th German/Japanese Symposium on Bubble Columns, VDI-GVC Society for Process Engineering, 20-23 May 2006, Goslar.
[Konferenz- oder Workshop-Beitrag], (2006)

Typ des Eintrags: Konferenz- oder Workshop-Beitrag (Keine Angabe)
Erschienen: 2006
Autor(en): Alke, A. ; Bothe, D.
Titel: A VOF-based method for the simulation of gas bubbles influenced by surfactants
Sprache: Englisch
Fachbereich(e)/-gebiet(e): Fachbereich Mathematik > Mathematical Modelling and Analysis
Keine Angabe
Zentrale Einrichtungen
Fachbereich Mathematik
Veranstaltungstitel: 7th German/Japanese Symposium on Bubble Columns, VDI-GVC Society for Process Engineering
Veranstaltungsort: Goslar
Veranstaltungsdatum: 20-23 May 2006
Hinterlegungsdatum: 12 Apr 2011 12:54
Alternatives oder übersetztes Abstract:
AbstractSprache
The focus of this contribution is on numerical simulation of processes with moving deformable interfaces involving a soluble surfactant. Resolution of the interface is based on the Volume-of-Fluid (VOF)-method. The current numerical approach is applicable to diffusion controlled processes, where the relation between the area-specific surfactant concentration on the interface and the volume-specific concentration in the sub-layer adjacent to the interface is given by an adsorption isotherm. The change in time of the amount of surfactant within a fixed control volume containing interface is determined by diffusive and convective fluxes both in the bulk phase and on the interface and by advection of the interface itself. Simulations are done with the commercial CFD-solver Fluent 6.1. A source term for the surfactant transport equation in the continuous phase which accounts for interfacial stretching is implemented. For proper discretization of the diffusive interfacial fluxes and the additional source term, a reconstruction of the interface by means of a continuous iso-surface with respect to the VOF-variable is used.Englisch
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