Robert Koslover
Certified Consultant
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Posted:
9 years ago
4 mai 2016, 14:06 UTC−4
You can do a line integral of the component of the Poynting vector (e.g., emw.Poavy) along the edge of interest to you. There are several ways to set up such an integral. For example: (1) as a probe, or (2) as a post-computation derived value
For the first approach, go to: Component 1---> Definitions . Right-click Definitions, choose Probes --> Boundary Probe. Change Type to Integral. Choose the boundary in question. Under expression, choose the appropriate Poynting vector component. Then either plot or evaluate/tabulate this probe value after you run the model.
For the second approach, run the model first, then go to Results --> Derived Values. Right-click Derived Values and choose Integration --> Line Integration. Under expression, choose the appropriate Poynting vector component. Then click on "Evaluate".
You can do a line integral of the component of the Poynting vector (e.g., emw.Poavy) along the edge of interest to you. There are several ways to set up such an integral. For example: (1) as a probe, or (2) as a post-computation derived value
For the first approach, go to: Component 1---> Definitions . Right-click Definitions, choose Probes --> Boundary Probe. Change Type to Integral. Choose the boundary in question. Under expression, choose the appropriate Poynting vector component. Then either plot or evaluate/tabulate this probe value after you run the model.
For the second approach, run the model first, then go to Results --> Derived Values. Right-click Derived Values and choose Integration --> Line Integration. Under expression, choose the appropriate Poynting vector component. Then click on "Evaluate".
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Posted:
9 years ago
6 mai 2016, 01:41 UTC−4
It works! Thanks a lot!
It works! Thanks a lot!
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Posted:
8 years ago
13 déc. 2016, 22:01 UTC−5
Hi,
What if I use structural mechanics module (frequency domain)? How can I compute the energy of elastic wave passing through a surface?
Thank you very much!
Hi,
What if I use structural mechanics module (frequency domain)? How can I compute the energy of elastic wave passing through a surface?
Thank you very much!
Henrik Sönnerlind
COMSOL Employee
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Posted:
8 years ago
14 déc. 2016, 10:34 UTC−5
Hi,
For structural mechanics, you can user the mechanical energy flux variables that are discussed in this thread:
www.comsol.com/community/forums/general/thread/30845
Regards,
Henrik
Hi,
For structural mechanics, you can user the mechanical energy flux variables that are discussed in this thread:
https://www.comsol.com/community/forums/general/thread/30845
Regards,
Henrik