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Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

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Laminar flow and Joule Heating

Posted Jul 19, 2011, 1:33 p.m. EDT Heat Transfer & Phase Change Version 4.4 4 Replies

Joseph Parisi
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I have a model where I'm trying to find the amount of heat produced by two electrodes in a microfluidic channel. When I create the model without laminar flow everything looks fine. The electrical current is flowing and increasing or decreasing the potential increases or decreases the temperature.

As soon as I add laminar flow, all of the velocity profiles look fine, but there is barely any heat generated. After a little searching I noticed the electrical conductivity of the fluid in the channel is no longer active in the material browser. Does this mean that while using the laminar flow model I cannot have electrical current through any of my fluids? Is there any way around this?

Thanks
4 Replies Last Post Dec 18, 2015, 10:20 a.m. EST
Joseph Parisi
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Posted: 1 decade ago Aug 1, 2011, 3:42 p.m. EDT
Still can't get this to work, any help?
Still can't get this to work, any help?
Shoval Zoran
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Posted: 1 decade ago Oct 4, 2011, 6:25 a.m. EDT
When I create the model without laminar flow everything looks fine. The electrical current is flowing and increasing or decreasing the potential increases or decreases the temperature.


Hi,
could you upload here the .mph file of the model without the laminar flow? I'm interested in seeing that. I don't know how to solve your problem though.

Thank you,
Shoval
[QUOTE]When I create the model without laminar flow everything looks fine. The electrical current is flowing and increasing or decreasing the potential increases or decreases the temperature. [/QUOTE] Hi, could you upload here the .mph file of the model without the laminar flow? I'm interested in seeing that. I don't know how to solve your problem though. Thank you, Shoval
Mindaugas Visockis
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Posted: 9 years ago Dec 18, 2015, 6:00 a.m. EST
Hi, I am also in face to this problem ....mph file will be very useful for me.

Thank You,

Mindaugas
Hi, I am also in face to this problem ....mph file will be very useful for me. Thank You, Mindaugas
Julien Givernaud
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Posted: 9 years ago Dec 18, 2015, 10:20 a.m. EST
Hi,

Please post an mph file where we can see the problem

Best regards

Julien
Hi, Please post an mph file where we can see the problem Best regards Julien

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