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Electrical currents in porous media
Posted Aug 4, 2020, 11:54 p.m. EDT Electromagnetic Heating, Fluid & Heat, Heat Transfer Version 5.5 1 Reply
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Hello!
I am doing simulation of saturated by water sand rock (porosity 0.35). No flow of water, but on the side borders I am applying eleсtric potential difference. Electrical current pathing through water accumulate temperature raising in the rock.
However I can not combine two modules: Electrical current and Heat transfer in Porous media. Comsol requires heat transfer parameters for rock and water, but electrical parameters - only for rock, without water. It can not do both.
How to solve this problem? Am I using wrong modules?
Thank you!
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Ekaterina,
the problem is that the ec physics doesn't know about the porosity. It only sees one homogeneous domain. A workaround may be to adapt the electrical conductivity of the domain to an effective conductivity of the porous material.
Cheers Edgar
-------------------Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com