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how to plot fraction of volume from 3D model?

Posted Sep 29, 2015, 5:18 a.m. EDT Results & Visualization Version 5.1, Version 5.2 5 Replies

Sepideh Ramezani
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Hi,

How is it possible to show volume plot for a special section of a 3D domain?
My 3D whole domain starts from x= [90-700(m)]
y=[50-500(m)]
z=[-10-2(m)]
But I want to show volume which is x=[360-400(m)]
y=[100-450(m)]
z=[0-2(m)]
I attached my domain and the parts that I want to plot in picture here (for better explanation).

How is it possible to plot it in comsol? Is it possible?

Thanks in advance for help
Sepideh
5 Replies Last Post Nov 16, 2015, 10:18 a.m. EST
Gerardo E. Villarreal-Garcia
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Posted: 9 years ago Sep 30, 2015, 6:25 a.m. EDT
Have you tried creating a Selection and applying it to the data set with your solution?

--
Gerardo E. Villarreal-Garcia
PhD Student

Centre for Quantum Photonics
H.H. Wills Physics Laboratory
University of Bristol
Tyndall Avenue
Bristol
BS8 1TL, UK

Office 1.25
Email: g.villarreal@bristol.ac.uk
Have you tried creating a Selection and applying it to the data set with your solution? -- Gerardo E. Villarreal-Garcia PhD Student Centre for Quantum Photonics H.H. Wills Physics Laboratory University of Bristol Tyndall Avenue Bristol BS8 1TL, UK Office 1.25 Email: g.villarreal@bristol.ac.uk
Magnus Ringh COMSOL Employee

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Posted: 9 years ago Sep 30, 2015, 7:18 a.m. EDT
Hi,

Another option is to add a Filter subnode to the Volume plot, and in its Logical expression for inclusion field use a logical expression for the spatial coordinates to plot only the fraction of the volume that fulfills that expression.

Best regards,
Magnus Ringh, COMSOL
Hi, Another option is to add a Filter subnode to the Volume plot, and in its Logical expression for inclusion field use a logical expression for the spatial coordinates to plot only the fraction of the volume that fulfills that expression. Best regards, Magnus Ringh, COMSOL
Sepideh Ramezani
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Posted: 9 years ago Sep 30, 2015, 10:36 a.m. EDT
Hi Gerardo,

Could you kindly explain which selection type should I consider and how? Do you have any example?

Looking foreard to hearing from you.
Sepideh




Have you tried creating a Selection and applying it to the data set with your solution?

--
Gerardo E. Villarreal-Garcia
PhD Student

Centre for Quantum Photonics
H.H. Wills Physics Laboratory
University of Bristol
Tyndall Avenue
Bristol
BS8 1TL, UK

Office 1.25
Email: g.villarreal@bristol.ac.uk


Hi Gerardo, Could you kindly explain which selection type should I consider and how? Do you have any example? Looking foreard to hearing from you. Sepideh [QUOTE] Have you tried creating a Selection and applying it to the data set with your solution? -- Gerardo E. Villarreal-Garcia PhD Student Centre for Quantum Photonics H.H. Wills Physics Laboratory University of Bristol Tyndall Avenue Bristol BS8 1TL, UK Office 1.25 Email: g.villarreal@bristol.ac.uk [/QUOTE]
Sepideh Ramezani
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Posted: 9 years ago Sep 30, 2015, 10:46 a.m. EDT
Hi Magnus,

Great, I solved my problem with your solution. But let me ask, I confronted with 2 questions:

1)When I tried to write logical expression like this: x > 360 && x < 400 && y > 100 && y < 450&& z > 0 && z < 2, then I was not able to show the volume plot, then I removed the z part, and it worked but
2)I applied this logical expression: x > 360 && x < 400 && y > 100 && y < 450
and I got plot (attached picture). I was expecting to have rectangle block but i is irregular block!

Is it related to my geometry? How is it possible to have simple rectangular block from this domain?

Hope to hear from you.
Sepideh


Hi,

Another option is to add a Filter subnode to the Volume plot, and in its Logical expression for inclusion field use a logical expression for the spatial coordinates to plot only the fraction of the volume that fulfills that expression.

Best regards,
Magnus Ringh, COMSOL


Hi Magnus, Great, I solved my problem with your solution. But let me ask, I confronted with 2 questions: 1)When I tried to write logical expression like this: x > 360 && x < 400 && y > 100 && y < 450&& z > 0 && z < 2, then I was not able to show the volume plot, then I removed the z part, and it worked but 2)I applied this logical expression: x > 360 && x < 400 && y > 100 && y < 450 and I got plot (attached picture). I was expecting to have rectangle block but i is irregular block! Is it related to my geometry? How is it possible to have simple rectangular block from this domain? Hope to hear from you. Sepideh [QUOTE] Hi, Another option is to add a Filter subnode to the Volume plot, and in its Logical expression for inclusion field use a logical expression for the spatial coordinates to plot only the fraction of the volume that fulfills that expression. Best regards, Magnus Ringh, COMSOL [/QUOTE]

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Magnus Ringh COMSOL Employee

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Posted: 9 years ago Nov 16, 2015, 10:18 a.m. EST
Hi,

In COMSOL Multiphysics 5.2, there is a new Smooth option, which is now the default setting for the "Element nodes to fulfill expression" list in the Filter node's Settings window. Using that setting, you get much smother "filtered blocks", for example, even when the computational mesh is coarse.

Best regards,
Magnus Ringh, COMSOL

Hi, In COMSOL Multiphysics 5.2, there is a new Smooth option, which is now the default setting for the "Element nodes to fulfill expression" list in the Filter node's Settings window. Using that setting, you get much smother "filtered blocks", for example, even when the computational mesh is coarse. Best regards, Magnus Ringh, COMSOL

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