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Weak Boundary on COMSOL 3.5 a COMSOL 4.2a

Posted Apr 19, 2012, 5:16 p.m. EDT Version 4.2a 5 Replies

Omar Medina
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Hi, I am chemical engineer of the Mexico City.

In the work: square_droplet_2Daxi_reset.mph, that this in the comsol version 3.5a, in the tutorial in the step 7:

Open the Equation Systyem > Boundary Settings from the Physics menu. Enter on the Weak tab for Boundaries 3, 4 and 5:
-nu_surf*r*test(uTr)- nu_surf*test(u) for u (5th line)
-nu_surf*r*test(vTz) for v (6th line)
These expressions represent the terms of the integral.


My question is: How do I implement this in the version of COMSOL 4.2a?

5 Replies Last Post Oct 27, 2012, 4:11 a.m. EDT
Peiding Chen
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Posted: 1 decade ago Apr 30, 2012, 12:15 p.m. EDT
an exemple,

add physics laminar flow.
activate "advanced physics interface options" through the "show" label at the "Model builder"
right click "laminar flow" you will find "weak contribution" etc. in the option "more"

hope that this helps
an exemple, add physics laminar flow. activate "advanced physics interface options" through the "show" label at the "Model builder" right click "laminar flow" you will find "weak contribution" etc. in the option "more" hope that this helps
Omar Medina
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Posted: 1 decade ago Jun 5, 2012, 5:00 p.m. EDT
Dear: Peiding Chen

thank you for the information, you could send me your personal mail to contact
Dear: Peiding Chen thank you for the information, you could send me your personal mail to contact
Peiding Chen
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Posted: 1 decade ago Jun 11, 2012, 4:17 a.m. EDT
Yeah, of course. Texted you
Yeah, of course. Texted you
Prashant Agrawal
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Posted: 1 decade ago Oct 27, 2012, 4:10 a.m. EDT
Hello,

I am working on the same problem on 4.2a. I used the 'Weak Contribution' and entered the entire expression on the given field but it is still not working.

Can someone please help me out on this?

Thanks and Regards,
Prashant
Hello, I am working on the same problem on 4.2a. I used the 'Weak Contribution' and entered the entire expression on the given field but it is still not working. Can someone please help me out on this? Thanks and Regards, Prashant
Prashant Agrawal
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Posted: 1 decade ago Oct 27, 2012, 4:11 a.m. EDT
Hello,

I am working on the same problem on 4.2a. I used the 'Weak Contribution' and entered the entire expression on the given field but it is still not working.

Can someone please help me out on this?

Thanks and Regards,
Prashant
Hello, I am working on the same problem on 4.2a. I used the 'Weak Contribution' and entered the entire expression on the given field but it is still not working. Can someone please help me out on this? Thanks and Regards, Prashant

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