Menu

Discussion Forum

New Discussion
Filtrer

Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.

Flow vector from a 3D solution into 2D

Posted 28 juil. 2016, 09:09 UTC−4 Computational Fluid Dynamics (CFD), Geometry, Parameters, Variables, & Functions Version 5.2a 3 Replies

Georgi Trenchev
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Hello,

I have the following problem: I have a 3D simulation of a gas flow in Comsol 5.0. Now I want to add some heating effects, but as the geometry is cylindrical, a 2D axial symmetric model will do as well. How can I incorporate the resulting 3D flow solution (translated into cylindrical coordinates) into another study in 2D? I tried the "extrude" option, but I could not figure it out.

Thanks a lot!

George
3 Replies Last Post 1 août 2016, 04:01 UTC−4
Frank van Gool COMSOL Employee

Please login with a confirmed email address before reporting spam

Posted: 8 years ago 28 juil. 2016, 10:12 UTC−4
Dear George,
You would like to take a look at the projection methods in COMSOL:
www.comsol.com/blogs/analyze-simulation-results-projection-operators/

Or use the values from a single slice of your 3D geometry using an extrusion if the results of the flow are axi-symmetric as well.:
www.comsol.com/blogs/part-2-mapping-variables-with-general-extrusion-operators/

Best regards,
Frank
Dear George, You would like to take a look at the projection methods in COMSOL: https://www.comsol.com/blogs/analyze-simulation-results-projection-operators/ Or use the values from a single slice of your 3D geometry using an extrusion if the results of the flow are axi-symmetric as well.: https://www.comsol.com/blogs/part-2-mapping-variables-with-general-extrusion-operators/ Best regards, Frank
Georgi Trenchev
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 8 years ago 29 juil. 2016, 03:29 UTC−4
Dear Frank,

Thank you for the reply. I've been looking at these tutorials for quite some time, but it is still unclear for me how to perform this simple task (see attached). Ok, I can assign the extrusion, and then? Where does the data go? I assume I should define a new component, which is 2D axial symmetric. Then, how do I take the data for the new solution to use? Should I define new variables in the new component, such as mod1.ux = mod2.ux ? I get simply zero's for the vector in the 2D component. Can you point me to a tutorial model in the library? I think I'm missing something.

Thanks a lot again,

George




Dear Frank, Thank you for the reply. I've been looking at these tutorials for quite some time, but it is still unclear for me how to perform this simple task (see attached). Ok, I can assign the extrusion, and then? Where does the data go? I assume I should define a new component, which is 2D axial symmetric. Then, how do I take the data for the new solution to use? Should I define new variables in the new component, such as mod1.ux = mod2.ux ? I get simply zero's for the vector in the 2D component. Can you point me to a tutorial model in the library? I think I'm missing something. Thanks a lot again, George
Frank van Gool COMSOL Employee

Please login with a confirmed email address before reporting spam

Posted: 8 years ago 1 août 2016, 04:01 UTC−4
Dear George,

In essence, you make the results from one source of the extrusion available on the destination.

Some tutorials that use this include:
www.comsol.com/blogs/using-general-extrusion-operators-to-model-periodic-structures/
www.comsol.com/blogs/accessing-non-local-variables-with-linear-extrusion-operators/
www.comsol.com/model/turbulent-flow-over-a-backward-facing-step-228
www.comsol.com/model/submodel-in-a-wheel-rim-8517

Best regards,
Frank
Dear George, In essence, you make the results from one source of the extrusion available on the destination. Some tutorials that use this include: https://www.comsol.com/blogs/using-general-extrusion-operators-to-model-periodic-structures/ https://www.comsol.com/blogs/accessing-non-local-variables-with-linear-extrusion-operators/ https://www.comsol.com/model/turbulent-flow-over-a-backward-facing-step-228 https://www.comsol.com/model/submodel-in-a-wheel-rim-8517 Best regards, Frank

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.

Suggested Content