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How To Create A Coefficient That Depends On Water Content

Posted 27 juin 2024, 03:48 UTC−4 Heat Transfer 1 Reply

Junhyeok Yeom
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Dear all,

I'm dealing with a 2 coupled PDE problem, related with diffusion of water in porous media, where the two variables are the temperature and the relative humidity.

I want to introduce a thermal conductivity which depends on the water content, k(w), but once I define it, it says that "I don't know what's w". I also defined w as an analytic function dependent on the relative humidity.

My question is: Can I define a coefficient that depends on a variable? (Apart from P or T)

Thanks a lot. Regards,

1 Reply Last Post 28 juin 2024, 09:56 UTC−4
Jeff Hiller COMSOL Employee

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Posted: 8 months ago 28 juin 2024, 09:56 UTC−4

Hello Junhyeok,

If the relative humidity is "c", then your call to k should read something like k(w(c)). Give it a try, and post your mph file, with the mesh and solution cleared, if that does not resolve it.

Best,

Jeff

-------------------
Jeff Hiller
Hello Junhyeok, If the relative humidity is "c", then your call to k should read something like k(w(c)). Give it a try, and post your mph file, with the mesh and solution cleared, if that does not resolve it. Best, Jeff

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