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Flux Calculation

Posted Aug 21, 2012, 1:21 p.m. EDT Results & Visualization Version 4.2a 2 Replies

Mao Mao
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Hi all,

I am doing simulation for a problem that involves coupling between electrostatics and transport of diluted species.

In the problem I used "No Flux" condition for all species at one wall. I was able to obtain results. However, when I plot the total normal flux along that wall (with "chds.ntflux_c1" expression), the flux is NOT ZERO, not even close.

I refined the meshes near the wall but got the same problem.

Does someone know the reason and how to fix it? I am using 4.2a.

Thanks.
2 Replies Last Post Dec 2, 2014, 7:03 a.m. EST
COMSOL Moderator

Hello Mao Mao

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Charlotte Constans
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Posted: 1 decade ago Dec 2, 2014, 1:52 a.m. EST
Hi Mao,

I'm having the same issue with 5.0. Have you solved it?

Thanks,

Charlotte
Hi Mao, I'm having the same issue with 5.0. Have you solved it? Thanks, Charlotte
Lasse Murtomäki
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Posted: 1 decade ago Dec 2, 2014, 7:03 a.m. EST
Hi

I join the choir: I have struggled with this for long. At some point I used reacf operator but I did not quite understand its function. Documentation is not very clear. I wish Comsol staff sees this outcry :)

Lasse
Hi I join the choir: I have struggled with this for long. At some point I used reacf operator but I did not quite understand its function. Documentation is not very clear. I wish Comsol staff sees this outcry :) Lasse

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