Meaning of "node" vs. "vertex" vs. "degree of freedom" for linear finite...
Hi there, can anybody tell me what COMSOL means by the word "node" in contrast to "vertex" or "degree of freedom" when it comes to the discretization? I have...
View ArticleRe: Meaning of "node" vs. "vertex" vs. "degree of freedom" for linear finite...
Hi I read "vertex" as a geometrical vertex (intersection of two edges, or three planes non-parallel ...) Vertex is for me asynonyme to Point when used for an geometrical Object (I distinguish a...
View ArticleRe: Meaning of "node" vs. "vertex" vs. "degree of freedom" for linear finite...
Hi Ivar, thanks for your answer. I totally agree with you and that is how I understand FEM from theory. But what confuses me is the formulas above from the knowledge base. They seem to be...
View ArticleRe: Meaning of "node" vs. "vertex" vs. "degree of freedom" for linear finite...
Joerg- Why can't you have more elements than nodes? You definitely can. See attached mesh with 24 elements and 17 nodes. Also, I created a simple cube and meshed with an extra fine mesh resolution with...
View ArticleRe: Meaning of "node" vs. "vertex" vs. "degree of freedom" for linear finite...
Hey Josh, thank you so much for this picture. That was a real eye opener. I always assumed that there must be more vertices/nodes than tetrahedra. That is why outputs like ========== Results: ~400k...
View ArticleRe: Meaning of "node" vs. "vertex" vs. "degree of freedom" for linear finite...
You're welcome, Joerg. A picture is worth a thousand words! Where exactly does the 0.2 ratio come from? I'm not sure. A round-off of 0.175 maybe? I tried a cube and a sphere and got the same ratio of...
View ArticleRe: Meaning of "node" vs. "vertex" vs. "degree of freedom" for linear finite...
That sounds plausible. Thank you once again for your help. Joerg
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