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Take the surface average on the outlet and inlet boundaries

Posted Mar 28, 2017, 3:32 a.m. EDT Interfacing, Studies & Solvers Version 5.2a 2 Replies

Ehsan Farno
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Dear All,
I am trying to create a loop in MATLAB to control my COMSOL simulation. I am not good at using the COMSOL operators. Can any one tell me how to take the average of my variables at the boundary within the loop. For instance, I need to calculate the difference of my inlet and outlet concentrations within the loop.


.
Regards
2 Replies Last Post Mar 28, 2017, 11:18 p.m. EDT
Mohammad Amin Kazemi
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Posted: 8 years ago Mar 28, 2017, 2:25 p.m. EDT

Dear All,
I am trying to create a loop in MATLAB to control my COMSOL simulation. I am not good at using the COMSOL operators. Can any one tell me how to take the average of my variables at the boundary within the loop. For instance, I need to calculate the difference of my inlet and outlet concentrations within the loop.


.
Regards


Ehsan,
In COMSOL, follow this:
Model 1->Definitions->Component coupling->Average
The function name becomes aveop1 by default. Select the boundary that you want to take the average of a variable on. Then run the simulation. To calculate the average of the desired variable, lets say c, simply use aveop1(c). For each boundary, you have to define a new function. (aveop2, aveop3,...).
Hope this helps.
[QUOTE] Dear All, I am trying to create a loop in MATLAB to control my COMSOL simulation. I am not good at using the COMSOL operators. Can any one tell me how to take the average of my variables at the boundary within the loop. For instance, I need to calculate the difference of my inlet and outlet concentrations within the loop. . Regards [/QUOTE] Ehsan, In COMSOL, follow this: Model 1->Definitions->Component coupling->Average The function name becomes aveop1 by default. Select the boundary that you want to take the average of a variable on. Then run the simulation. To calculate the average of the desired variable, lets say c, simply use aveop1(c). For each boundary, you have to define a new function. (aveop2, aveop3,...). Hope this helps.
Ehsan Farno
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Posted: 8 years ago Mar 28, 2017, 11:18 p.m. EDT
Thanks for responding
I know that. But I am wondering why this operator does not return a value. I can see its answer is a 2*181 matrice. I cannot understand it. Do you know if I can use it in my equations or it is just an operator for analysing the results.
Thanks for responding I know that. But I am wondering why this operator does not return a value. I can see its answer is a 2*181 matrice. I cannot understand it. Do you know if I can use it in my equations or it is just an operator for analysing the results.

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