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February 27, 2012, 14:21 |
Modelling a Water-Air bubble column
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#1 |
Senior Member
Gerhard Holzinger
Join Date: Feb 2012
Location: Austria
Posts: 342
Rep Power: 28 |
Greetings foamers,
I try to simulate a water-air bubble column like the becker test-case (Becker et al. 1999: flat bubble column, single gas-sparger in the centre of the bottom) The mesh is easily built using blockMesh. I attached a screenshot of the mesh. The solver I use is twoPhaseEulerFoam. My questions are: Which dragModels are recommended for gas bubble - water eulerian simulation? Are there any changes that have to be made when starting from one of the tutorial cases? |
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February 28, 2012, 05:12 |
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#2 |
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Alberto Passalacqua
Join Date: Mar 2009
Location: Ames, Iowa, United States
Posts: 1,912
Rep Power: 36 |
The standard drag model used for that test cases by many authors in the literature is Schiller-Neumann, and the drag phase is the dispersed one (air). OpenFOAM defaults to the "blended" model, which is more stable when phase separation occurs.
Best,
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Alberto Passalacqua GeekoCFD - A free distribution based on openSUSE 64 bit with CFD tools, including OpenFOAM. Available as in both physical and virtual formats (current status: http://albertopassalacqua.com/?p=1541) OpenQBMM - An open-source implementation of quadrature-based moment methods. To obtain more accurate answers, please specify the version of OpenFOAM you are using. |
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