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How do I model an electrically conducting fluid (lava) flowing through a tube?
Posted 2021年7月26日 GMT-4 14:15 Low-Frequency Electromagnetics, Plasma Physics, Computational Fluid Dynamics (CFD) Version 5.6 2 Replies
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Hello,
I am new to COMSOL and multiphysics modeling in general, and would appreciate any direction or help for this problem. I would like to model lava flowing though a tube to study how the earth's magnetic (uniform) field interact with the elctrically conducting fluid.
The electrical conductivity of basaltic lava can be up to 2 S/m, viscosity is as low as 40 Pa s, velocity up to 10 m/s, Earth's magnetic field is 30-60 microTeslas. I could like to consider a field perpendicular to the flow. Lava tubes can be up to 100km long and 30 meters wide.
How can I set up this model?
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The Magnetic and Electric Fields (mef) formulation in the AC/DC module includes the v cross B term you need to couple the fluid motion with the EM fields. Solve self-consistently with v from the CFD module.
-------------------Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara
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This blog contribution by Walter Frei may be useful: https://www.comsol.de/blogs/building-a-magnetohydrodynamic-multiphysics-model-in-comsol/
-------------------Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com