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A simple integration problem
Posted 1 mars 2014, 08:31 UTC−5 Version 4.3b 1 Reply
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Hi
I need to integrate a curve with respect to time, but I dont know how to do so using COMSOL. My values representing my curve is a solution from a transient model, and is a ratio between two values hence dimensionless ([-]). A picture of the curve can be seen in the attached png-file.
I have tried "Definitions->Model Couplings->Integration" but it won't work since I'm asked to select a "Geometric entity level" which my curve dont have. I haven't had any luck using the mathematical in-built operators shown in the documentation. - or am I missing something?
I hope you can help me.
(I'm using COMSOL 4.3b)
Thanks in advance
I need to integrate a curve with respect to time, but I dont know how to do so using COMSOL. My values representing my curve is a solution from a transient model, and is a ratio between two values hence dimensionless ([-]). A picture of the curve can be seen in the attached png-file.
I have tried "Definitions->Model Couplings->Integration" but it won't work since I'm asked to select a "Geometric entity level" which my curve dont have. I haven't had any luck using the mathematical in-built operators shown in the documentation. - or am I missing something?
I hope you can help me.
(I'm using COMSOL 4.3b)
Thanks in advance
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1 Reply Last Post 1 mars 2014, 17:05 UTC−5
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Posted:
1 decade ago
You may want to have a look there: www.comsol.com/support/knowledgebase/913/
Cheers
Edgar
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Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com