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Coupling of 2d axially symmetric geometry with 3D-T-junction

Posted 18 giu 2014, 03:24 GMT-4 Fluid & Heat, Geometry, Parameters, Variables, & Functions Version 4.3, Version 4.3a, Version 4.3b, Version 4.4 3 Replies

Nils Ellendt
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Dear all,

I am modeling a flow simulation where I would like to couple axially symmetric tubes to a 3D T junction (pipe flow would not be an option for me as my fluid flow is a little special - I need control over its radial districution).

So I have to do the coupling from the end of a 2D-tube (radial 'line' bounday) to 3D T-junction (sphere boundary, same diameter). I just found information on extrusion coupling which is not working for my case (I guess).

Does anybody have an idea how to map this?

Best regards,

Nils
3 Replies Last Post 24 gen 2017, 22:31 GMT-5
Erik Bornhöft COMSOL Employee

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Posted: 1 decade ago 26 giu 2014, 11:39 GMT-4
Dear Nils,

if you want to couple boundary conditions from several model components, especially of different space dimensions, the general extrusion model coupling variable is exactly what you need. Please check attached example model I made up to explain how to use that variable. Please note I used default settings except the solver settings for "fully coupled" computation: Since the flow variables of component 1 and 2 are directly coupled, you cannot use a segregated solver.

Another example that makes use of general extrusion and the coupling of different model components is the "rim submodel" from our model library:
www.comsol.de/model/submodel-in-a-wheel-rim-8517

--
Best regards,
Erik

*********************
Erik Bornhöft
Senior Technical Sales Engineer
COMSOL Multiphysics GmbH
Robert-Gernhardt-Platz 1
37073 Göttingen
Deutschland

Knowledge Base:
www.comsol.de/support/knowledgebase/browse/900/

COMSOL Blog:
www.comsol.de/blogs/
Dear Nils, if you want to couple boundary conditions from several model components, especially of different space dimensions, the general extrusion model coupling variable is exactly what you need. Please check attached example model I made up to explain how to use that variable. Please note I used default settings except the solver settings for "fully coupled" computation: Since the flow variables of component 1 and 2 are directly coupled, you cannot use a segregated solver. Another example that makes use of general extrusion and the coupling of different model components is the "rim submodel" from our model library: http://www.comsol.de/model/submodel-in-a-wheel-rim-8517 -- Best regards, Erik ********************* Erik Bornhöft Senior Technical Sales Engineer COMSOL Multiphysics GmbH Robert-Gernhardt-Platz 1 37073 Göttingen Deutschland Knowledge Base: http://www.comsol.de/support/knowledgebase/browse/900/ COMSOL Blog: http://www.comsol.de/blogs/
juanjorojash
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Posted: 9 years ago 2 nov 2015, 23:26 GMT-5
Excellent! I was looking for some example like this, now my model is coupled! Thanks



Excellent! I was looking for some example like this, now my model is coupled! Thanks
Yihan Xu
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Posted: 8 years ago 24 gen 2017, 22:31 GMT-5
Thank you for the answer.
Thank you for the answer.

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