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Flux Calculation

Posted 21.08.2012, 13:21 GMT-4 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 02.12.2014, 07:03 GMT-5
COMSOL Moderator

Hello Mao Mao

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Charlotte Constans
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Posted: 10 years ago 02.12.2014, 01:52 GMT-5
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: 10 years ago 02.12.2014, 07:03 GMT-5
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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