Hii there,
1. In order to be consistent with FVM, fluxes/forces or ... are calculated over the faces of the computational cell. Also note that surface tension is added as a volumetric force in momentum equation. 2. In general, VOF methods which are not tracking explicitly(by reconstructing the interface) the interface, are not representing the exact shape of the interface. This means you should not worry about which one is correct or not. As far as solution of momentum eq. is concerned the formulation should be done WRT cell faces. hope this helps... |
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Thank you very much for your comments. I have another question on comment #2. Could you please make clear on VOF methods which are not tracking explicit, why it does not represent the exact shape of interface? What are their drawback make interface not sharpen? |
the interface is not explicit since it is calculated from the colour function alpha. One disadvantage is that if you consider also surface tension with an implicit formulation of the interface you can generate parasitic currents. A very good article explaining interfoam is this one: https://iopscience.iop.org/article/1.../1/014016/meta
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Dear Michael,
I thank you very much for your comment with related paper. |
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