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free boundary conditions

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Hi everyone!

i'm at the very first steps with comsol.

i'm building a model that simulates the tumor growth. the equations that describe the growth are initially defined in a spherical small domain (the tumor), then i have a bigger domain that contains the small one. Since i'm studying the tumor growth obviously the tumor domain is not fixed but it changes its shape and size along the time. i used the level set function to track the tumor domain interface along the time but i don't know how to write in comsol the free boundary conditions for the tumor equations. Using the classical option: "boundary conditions" i can only specify the initial tumor boundary while i have to define the boundary conditions on the moving interface. How can i do that?

All suggestions gratefully received.


0 Replies Last Post Jun 2, 2013, 3:00 p.m. EDT
COMSOL Moderator

Hello Leonardo Massai

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