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Modeling melting in Comsol 5.5
Posted Mar 18, 2021, 8:14 a.m. EDT Fluid & Heat, Heat Transfer & Phase Change Version 5.5 0 Replies
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Hello everyone I'm trying to model melting due to laser as a heat source in Comsol 5.5. I have gon through many papers and most of them have suggested to model surface tension using Weak form. I have tried a lot and still struggling. I have tried alternative ways to model the same but I have not been able to achieve it. I have tried doing it using External Fluid Interface, Fluid Fluid Interface, Margoni Effect with mesh velocity, tried some weak comtribution equations also. I now want to impose this equation:
- in the normal direction:
sigma * vector(n) = -Pext * vector(n) + kappa * gamma * vector(n)
- in the tangential direction:
sigma * tangentialvector(t) = d(gamma)/d(T) * tangential.gradient(T) * vector(t)
I have tried several forms. But there are many issues like: I have two exposed boundaries. One at the top and the other at the bottom. So I want to model as the layer getting removed and then solidfy. But when I add surface tension on both boundaries they start moving towards each other.
Sorry for so long description. But I'm really stuck and want to learn this. Any help would be highly appreciated. I have already checked many models in Application Library and many papers to follow but couldnot achieve it.
Please help!!!!!! Thanks Harsh
Hello Harsh Goel
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