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Ring in 2D in a side projection for Langevin

Posted 2024/12/20 8:30 GMT-5 5 Replies

Sergey Filimonov
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Good day. Please tell me how to draw a ring in 2D in a side projection so that the program perceives it as a whole element? Because when drawing it from the side, the ring looks like a rectangle torn in the middle. This is necessary for constructing a Langevin piezoelectric emitter in 2D. Even if these two pieces are combined in geometry, then when choosing a material, it still breaks it into two pieces.

5 Replies Last Post 2024/12/20 10:40 GMT-5
Jeff Hiller COMSOL Employee

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Posted: 10 months ago 2024/12/20 8:47 GMT-5
Updated: 10 months ago 2024/12/20 9:15 GMT-5

Hello Sergey,

If this system is axisymmetric, then you should select 2D axisymmetric in the Model Builder. Then you will see that in the Graphics window when you are drawing the geometry the axis of revolution r=0 is shown; you should draw (half of what you currently have in your screenshots) on the r>=0 half.

For an example, see this tutorial or many others in the Application Gallery. Best,

Jeff

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Jeff Hiller
Hello Sergey, If this system is axisymmetric, then you should select 2D axisymmetric in the Model Builder. Then you will see that in the Graphics window when you are drawing the geometry the axis of revolution r=0 is shown; you should draw (half of what you currently have in your screenshots) on the r>=0 half. For an example, see [this tutorial](https://www.comsol.com/model/steady-state-2d-axisymmetric-heat-transfer-with-conduction-453) or [many others in the Application Gallery](https://www.comsol.com/models?q=axisymmetric). Best, Jeff
Sergey Filimonov
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Posted: 10 months ago 2024/12/20 8:54 GMT-5

Thank you very much.

Thank you very much.
Sergey Filimonov
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Posted: 10 months ago 2024/12/20 10:16 GMT-5

If the system as a whole is not axisymmetric (another Langevin appears, located nearby, and the elements above them are not axisymmetric), then what to do? It is also possible to draw this in 3D, but the calculation will be very, very long, if it is calculated at all.

If the system as a whole is not axisymmetric (another Langevin appears, located nearby, and the elements above them are not axisymmetric), then what to do? It is also possible to draw this in 3D, but the calculation will be very, very long, if it is calculated at all.
Jeff Hiller COMSOL Employee

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Posted: 10 months ago 2024/12/20 10:31 GMT-5

A 2D axisymmetric analysis can only be performed if the phenomenon is indeed axisymmetric. You may need to (try to) go 3D.

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Jeff Hiller
A 2D axisymmetric analysis can only be performed if the phenomenon is indeed axisymmetric. You may need to (try to) go 3D.
Sergey Filimonov
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Posted: 10 months ago 2024/12/20 10:40 GMT-5

Got it. Thank you.

Got it. Thank you.

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