Hello researchers!!
I have a question using the method SCLSVOF{ coupled level set and volume of fluid method}.
As interFOAM's representation of interface between two immiscible fluids is not clear due to spurious currents etc.., I was trying to overcome this drawback using LSVOF method.
My question: The level set function is calculated from the VOF's function in order to conserve mass. Once level set function is obtained finding, the normal, interface curvature, capillary forces are more precise and accurate. But the basic idea of developing a level set function from an VOF function which is smeared out and nonphysical at times is my problem. How can we ensure we have a sharp interface between fluids?
Any idea of how to overcome this issue,
Saideep
Hi Ariadne,
Thanks for your reply.
I have a peculiar case(file attached) where I see huge smearing of the interface using interFoam solver. This in turn leads to an error in the computation of the "capillary pressure". {I used a very fine refinement of d/dx = 30. This is a 2D case dealing with simple meniscus motion in a capillary tube}.
I used a interface compression term of alpha = 2. Not sure what other parameter can changed to prevent this sort of interface smearing.
Thanks;
Saideep
Hi Saideep,
OpenFoam uses Compressive scheme (like CICSAM) for interface evolution which is diffusive in nature (From my hand on experience on development of CICSAM). On the other hand sharp representation can be obtained by Geometrical methods. Think in this direction as well.
Best,
Hiteshkumar
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