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How to input integration functions?

Posted 24 mar 2012, 16:46 GMT-4 4 Replies

Ray
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There are two integration in my model, which is shown in the attached picture. How do I input them into Comsol? Thanks.

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4 Replies Last Post 27 mar 2012, 17:33 GMT-4
Victor Manuel Rodriguez Zermeno
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Posted: 1 decade ago 25 mar 2012, 15:04 GMT-4
You need to define domain (0,d), then set create a coupling operator on it.
Suppose intop1 is the operator. Then you have for the fist equation:
intop1(n_c(x))=ñ_c*d
I hope this helps.
Victor
You need to define domain (0,d), then set create a coupling operator on it. Suppose intop1 is the operator. Then you have for the fist equation: intop1(n_c(x))=ñ_c*d I hope this helps. Victor
Ray
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Posted: 1 decade ago 27 mar 2012, 16:23 GMT-4
Thank you, but where shall I define the operator intop1? Is it in the "Subdomain Integration Variable" submenu?
And where shall I input the equation?
Thank you, but where shall I define the operator intop1? Is it in the "Subdomain Integration Variable" submenu? And where shall I input the equation?
Ray
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Posted: 1 decade ago 27 mar 2012, 16:55 GMT-4
I cannot input the equation as it appears, can I? I mean, you cannot enter "=" in an expression...
I cannot input the equation as it appears, can I? I mean, you cannot enter "=" in an expression...
Alexander Kuznetsov
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Posted: 1 decade ago 27 mar 2012, 17:33 GMT-4
check how it's done in "An Integro-Partial Differential Equation" example. I think it has what you need.
check how it's done in "An Integro-Partial Differential Equation" example. I think it has what you need.

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