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Defining a parameter with respect to another parameter
Posted 1 juin 2021, 14:43 UTC−4 General, Parameters, Variables, & Functions, Equation-Based Modeling 2 Replies
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The below post is related to an archived discussion
Dear Comsol users,
The link to the previous discussion thread is on caculating band structure for a triangular lattice. However, a question I have is a simpler one and related to one of the steps mentioned in the thread. Following is the question: How can one define parameters 'a' and 'k' as follows: a=0...1; k=0...b1 | a=1...2; k=b1...b2 | a=2...3; k=b2...0 ? where I will then be doing a parametric sweep of parameter 'a' from 0 to 3.
Please let me know if someone else has come upon this problem and solved it. I would really appreciate it.
Sincerely, Pragalv
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You can define auxiliary parameters like
kstart: if(a<1,0,if(a<2,b1,b2))
kend: if(a<1,1,if(a<2,b2,0))
k: kstart+k1*(kend-kstart)
Then you make a sweep over a and k1, where k1 ranges from 0 to 1.
-------------------Henrik Sönnerlind
COMSOL
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Thank you Henrik!