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2D fluid dynamics with Comsol

Posted Jun 8, 2011, 7:35 a.m. EDT 3 Replies

Magali Cruel
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Hello everybody,

I'm currently using Comsol to simulate a fluid flow through a pipe filled with some particles.
I first made it in 2 dimensions, and now I'm wondering how does Comsol consider these 2-dimension problems. Does it consider that the section is infinitely thin (~plane stress) or infinitely thick (~plane strain) ?

Thank you!
Magali
3 Replies Last Post Jun 9, 2011, 9:42 a.m. EDT
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago Jun 8, 2011, 9:25 a.m. EDT
Hi

From my understanding so far all 2D are in fact 3D with the third dimension set to 1[m] depth by default (except for 2D-axi that have the depth curled around as a loop length "2*pi*r" that is a different topology)

This is only half of your question, I'm not relly confortable with your solid to fluidics analogy, needs some further thoughts ;)

--
Good luck
Ivar
Hi From my understanding so far all 2D are in fact 3D with the third dimension set to 1[m] depth by default (except for 2D-axi that have the depth curled around as a loop length "2*pi*r" that is a different topology) This is only half of your question, I'm not relly confortable with your solid to fluidics analogy, needs some further thoughts ;) -- Good luck Ivar
Magali Cruel
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Posted: 1 decade ago Jun 9, 2011, 4:11 a.m. EDT
Thank you Ivar,

That is really helpful.

Magali
Thank you Ivar, That is really helpful. Magali
Nagi Elabbasi Facebook Reality Labs
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Posted: 1 decade ago Jun 9, 2011, 9:42 a.m. EDT
The plane stress and plane terminology apply to solids only as Ivar mentioned. In planar 2D CFD there is no flow through the third dimension. That makes it similar to the 2D plane strain assumptions in solids.

Nagi Elabbasi
Veryst Engineering
The plane stress and plane terminology apply to solids only as Ivar mentioned. In planar 2D CFD there is no flow through the third dimension. That makes it similar to the 2D plane strain assumptions in solids. Nagi Elabbasi Veryst Engineering

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