Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
Derivatives in level set or phase field physics
Posted Apr 5, 2017, 2:42 p.m. EDT Fluid & Heat, Heat Transfer & Phase Change, Computational Fluid Dynamics (CFD), Mesh, Parameters, Variables, & Functions, Studies & Solvers 0 Replies
Please login with a confirmed email address before reporting spam
Suppose that you need to solve the heat conduction equation in two fluids coupled to the level set/phase field method:
∇∙(-k∇T)=0 with constant thermal conductivities of the fluids (k).
For the sharp interface physics, we can drop k and the equation becomes the Laplace's equation∇^2T=0
My question is that:
What is the equation to be solved when using the level set/phase field method?
Of course in this case, k is not constant anymore and is a function of levelset/phase field variable (φ).
Should we take k(φ) out of the derivative (-k(∇^2T)) or not (∇∙(-k∇T)=0)?
Amin,
Hello Mohammad Amin Kazemi
Your Discussion has gone 30 days without a reply. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help.
If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base.