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Heat transfer in porous media with phase change

Posted Mar 9, 2015, 4:35 a.m. EDT Heat Transfer & Phase Change Version 4.4 1 Reply

Filip Karlsson
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Hi! I am modelling water pipes buried in the ground during a year in a cold winter climate. I want to calculate the frost depth in the ground in order to prevent freezing of the water pipes. I am considering the soil to be the physics "Heat transfer in porous media".

My question: Is it possible to model phase change in the physics "Heat transfer in porous media"?

Because I have been trying without any success, so if any one have any idea in how to solve this problem I will be very grateful!

Many thanks
Filip
1 Reply Last Post May 8, 2015, 6:06 a.m. EDT
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Hello Filip Karlsson

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If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base.

Frank van Gool COMSOL Employee

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Posted: 10 years ago May 8, 2015, 6:06 a.m. EDT
Dear Filip,

you can add the phase change latent heat to your heat capacity material data of the soil.
You can take a look in www.comsol.com/model/phase-change-474
But you need to manually change the material in that case.

There should be plenty of data available on the method, and that is also applicable to soil. Think about the fraction of water vs. solid though in your material.

Best regards,
Frank

Dear Filip, you can add the phase change latent heat to your heat capacity material data of the soil. You can take a look in http://www.comsol.com/model/phase-change-474 But you need to manually change the material in that case. There should be plenty of data available on the method, and that is also applicable to soil. Think about the fraction of water vs. solid though in your material. Best regards, Frank

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