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Sharp Fluid-Fluid Interface

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I’m new to COMSOL, and I was hoping someone here would be able to help me. I am trying to model fluid displacement in a pipe. I could use the two-phase flow module, but I don’t need that level of precision for my application and it seems to greatly increase computation time. I really just need a perfectly sharp interface, and even assuming plug flow would be sufficient for now. Is there a way to implement this? Thanks!

2 Replies Last Post Feb 1, 2013, 10:34 a.m. EST
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)

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Posted: 1 decade ago Feb 1, 2013, 12:55 a.m. EST
Hi

make a cylinder for your liquid, the external cylindrical surface is your "sharp" I/F or didn't I catch your right ?

if you want to model the "solid" wall and the fluid, make a cylinder and add a thin "layer" for the wall

--
Good luck
Ivar
Hi make a cylinder for your liquid, the external cylindrical surface is your "sharp" I/F or didn't I catch your right ? if you want to model the "solid" wall and the fluid, make a cylinder and add a thin "layer" for the wall -- Good luck Ivar

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Posted: 1 decade ago Feb 1, 2013, 10:34 a.m. EST
You could use two phase flow-ALE module to simulate the oil displacement; the other options are level-set or phase-field. If you do not expect large deformations or topological changes then ALE could be used. You may also want to read the following:

www.comsol.com/support/knowledgebase/1025/

Good Luck.
You could use two phase flow-ALE module to simulate the oil displacement; the other options are level-set or phase-field. If you do not expect large deformations or topological changes then ALE could be used. You may also want to read the following: http://www.comsol.com/support/knowledgebase/1025/ Good Luck.

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