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What's the meaning of "topology changes"?
Posted Dec 2, 2010, 2:32 p.m. EST 1 Reply
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As I read the comsol examples, i saw an sentance, "The level set method as well as the phase field method are both well suited for modeling moving boundaries where topology changes occur", i don't know the definition of "topology changes", at which situation, we can consider that the topology changes occur? Thank you!
1 Reply Last Post Dec 3, 2010, 1:33 a.m. EST
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Posted:
1 decade ago
Hi
Check on Wiki for "topology".
Basically its the fact that your geometry changes i.e. number of domains and boundaries, this might happen when you have contact of structures in a fluid, the fluid domain dissapears between the two parts in contact, this is a topology change (number of geometrical domains and boundaries and their respective loops changes => entity renumbering.
The "level set method" is stating that a "material" boundary (i.e. fluid inside another fluid) is defined by a bolean equation related to the space coordinates. One limitation with this method: you define a physics for one domain, so the different materials you define in this domain must use the SAME physics (i.e. structural and fluids do not basically use the same physics, but in some cases you can live with the approximation solid structure = fluid physics)
--
Good luck
Ivar
Check on Wiki for "topology".
Basically its the fact that your geometry changes i.e. number of domains and boundaries, this might happen when you have contact of structures in a fluid, the fluid domain dissapears between the two parts in contact, this is a topology change (number of geometrical domains and boundaries and their respective loops changes => entity renumbering.
The "level set method" is stating that a "material" boundary (i.e. fluid inside another fluid) is defined by a bolean equation related to the space coordinates. One limitation with this method: you define a physics for one domain, so the different materials you define in this domain must use the SAME physics (i.e. structural and fluids do not basically use the same physics, but in some cases you can live with the approximation solid structure = fluid physics)
--
Good luck
Ivar