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Expansion of air volume

Posted Apr 25, 2016, 5:01 a.m. EDT Computational Fluid Dynamics (CFD), Heat Transfer, Electrochemistry, Structural Mechanics Version 5.0 2 Replies

Enrico Chinello
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Hello,
I want to model to thermal expansion of a certain volume of air (in 2D), contained between solid walls and able to expand upward pushing towards a stretchable membrane. I managed to get some results using "Solid Mechanics" and solid materials but when it comes to air I don't really know how to model the system. Could you please help me?

Thanks a lot.

Enrico
2 Replies Last Post Apr 25, 2016, 8:26 a.m. EDT
Sven Friedel COMSOL Employee

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Posted: 9 years ago Apr 25, 2016, 5:48 a.m. EDT
Dear Enrico,

the approach depends on whether your air volume can be assumed to be perfectly mixed or not. IN the first case the following tutorial could give a guideline on how to model gas volumes under pressure in a closed volume.

www.comsol.de/model/hyperelastic-seal-206

Best regards,

Sven Friedel
Dear Enrico, the approach depends on whether your air volume can be assumed to be perfectly mixed or not. IN the first case the following tutorial could give a guideline on how to model gas volumes under pressure in a closed volume. https://www.comsol.de/model/hyperelastic-seal-206 Best regards, Sven Friedel
Henrik Sönnerlind COMSOL Employee

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Posted: 9 years ago Apr 25, 2016, 8:26 a.m. EDT
Hi,

There are also a couple of blog posts on similar themes:

www.comsol.se/blogs/computing-controlling-volume-cavity/
www.comsol.se/blogs/modeling-hydrostatic-pressure-fluid-deformable-container/

Regards,
Henrik
Hi, There are also a couple of blog posts on similar themes: https://www.comsol.se/blogs/computing-controlling-volume-cavity/ https://www.comsol.se/blogs/modeling-hydrostatic-pressure-fluid-deformable-container/ Regards, Henrik

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