| Item Type: |
Conference or Workshop Item
|
| Erschienen: |
2006 |
| Creators: |
Alke, A. and Bothe, D. |
| Title: |
A VOF-based method for the simulation of gas bubbles influenced by surfactants |
| Language: |
English |
| Divisions: |
04 Department of Mathematics > Mathematical Modelling and Analysis
UNSPECIFIED
Zentrale Einrichtungen
04 Department of Mathematics |
| Event Title: |
7th German/Japanese Symposium on Bubble Columns, VDI-GVC Society for Process Engineering |
| Event Location: |
Goslar |
| Event Dates: |
20-23 May 2006 |
| Date Deposited: |
12 Apr 2011 12:54 |
| Alternative Abstract: |
| Alternative abstract | Language |
|---|
| 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. | English |
|
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