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VOF-simulation of fluid particles influenced by soluble surfactants

Alke, A. and Bothe, D. (2007):
VOF-simulation of fluid particles influenced by soluble surfactants.
In: paper S1ThuC57, In: 6th International Conference on Multiphase Flow, ICMF2007, Leipzig, [Conference or Workshop Item]

Item Type: Conference or Workshop Item
Erschienen: 2007
Creators: Alke, A. and Bothe, D.
Title: VOF-simulation of fluid particles influenced by soluble surfactants
Language: English
Series Name: paper S1ThuC57
Uncontrolled Keywords: Surface active agent, Marangoni stress
Divisions: 04 Department of Mathematics > Mathematical Modelling and Analysis
UNSPECIFIED
Zentrale Einrichtungen
04 Department of Mathematics
Event Title: 6th International Conference on Multiphase Flow, ICMF2007
Event Location: Leipzig
Date Deposited: 12 Apr 2011 12:53
Alternative Abstract:
Alternative abstract Language
The focus of this contribution is on numerical simulation of processes with moving deformable interfaces involving soluble surfactants. Resolution of the interface is based on the Volume-of-Fluid (VOF)-method. An extended surface transport theorem is used for modelling the convective interface flux of the adsorbed surfactant. The numerical discretisation of terms relating to interfacial processes is based on an iso-surface concerning the VOF-variable as a connected approximation of the interface. The VOF method is applicable to diffusion controlled processes but not limited to a certain adsorption isotherm and surface equation of state. First numerical 3D - experiments on a bubble rising in a surfactant solution were done with the commercial CFD-solver Fluent 6.2. The expected surfactant distribution at the bubble interface and in the bulk phase could be obtained. The known formation of two vortices inside the bubble and the resulting retardation are also reflected.English
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