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calculate the volume under certain condition

Posted 24 apr 2023, 03:58 GMT-4 RF & Microwave Engineering, Results & Visualization Version 6.0 4 Replies

Myeong jin Oh
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Now I'm in trouble in calculating volume of result.

For example, when I did electromagnet field simulation for plasmonic nanoparticle at certain matched wavelength in RF module or wave optics, I could get the electromagnetic field contour map 3d or 2d plane. In this part, when i got 3d electric field contour map, can i get the certain volume in this type of map??? if there is range of e-field 0 to 300, can i get the volume that satisfying my condition selectively like certain range 100 to 200?

If it is possible please explain me.... I 'm newbie in this area... \

Thank you for reading this

4 Replies Last Post 25 apr 2023, 07:10 GMT-4
Gunnar Andersson COMSOL Employee

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Posted: 2 years ago 24 apr 2023, 10:46 GMT-4

Suppose that you want to compute the volume where EXPR is between A and B. Then you can use a Volume Integration feature in Results > Derived Values or Results > Evaluation Group and use the integrand expression

(EXPR >= A) && (EXPR <= B)

There are more advanced variations of this technique that give better accuracy: You can use Filter datasets to extract the volume that satisfies the conditions.

Suppose that you want to compute the volume where EXPR is between A and B. Then you can use a Volume Integration feature in Results > Derived Values or Results > Evaluation Group and use the integrand expression (EXPR >= A) && (EXPR
Myeong jin Oh
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Posted: 2 years ago 25 apr 2023, 01:45 GMT-4
Updated: 2 years ago 25 apr 2023, 01:45 GMT-4

I really appreciate to your kind answer for this question.

I understand what you mean exactly but can you explain more about more advanced variations for better accuracy by using filter dataset?

I really appreciate to your kind answer for this question. I understand what you mean exactly but can you explain more about more advanced variations for better accuracy by using filter dataset?
Gunnar Andersson COMSOL Employee

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Posted: 2 years ago 25 apr 2023, 03:41 GMT-4

I really appreciate to your kind answer for this question.

I understand what you mean exactly but can you explain more about more advanced variations for better accuracy by using filter dataset?

To measure the volume of the domain where EXPR <= B:

  • Create a Filter dataset.
  • Set the Expression to EXPR.
  • Set Bounds to Upper.
  • Set Upper bound to B.
  • Create a Volume Integration feature that refers to the Filter dataset, set the expression to 1.

To generalize this to A <= EXPR <= B, use two Filter datasets.

>I really appreciate to your kind answer for this question. > >I understand what you mean exactly but can you explain more about more advanced variations for better accuracy by using filter dataset? To measure the volume of the domain where EXPR
Myeong jin Oh
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Posted: 2 years ago 25 apr 2023, 07:10 GMT-4

Thanks you for your favor.

Actually now this is the almost first time to doing simulate like this.

Again thank you!

Thanks you for your favor. Actually now this is the almost first time to doing simulate like this. Again thank you!

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