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How to integrate current density

Posted 2020年12月19日 GMT+1 14:11Electromagnetics, Low-Frequency Electromagnetics, Plasma PhysicsVersion 5.43 Replies

Coco
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Hi,everyone.I'm a new learner of this software.Now,I have a question. I am doing research on gas discharge, in which a special detection probe is set up. I want to ask how to integrate the current density on the probe surface.The attached picture is the probe model I set(My picture failed to upload. Here, you can imagine the probe as a cuboid, then my question is how to integrate the current density on the surface of this cuboid against the area). Urgently need your help!!
3 Replies Last Post 2020年12月20日 GMT+1 18:04
Robert Koslover Certified Consultant
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Posted: 4 years ago 2020年12月20日 GMT+1 00:06

Assuming you have already executed the model, go toResults, right-click onDerived Valuesand chooseIntegration, thenSurface Integration. Then, choose your surfaces and enter the current distribution expression that you want to integrate.

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Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara
Assuming you have already executed the model, go to **Results**, right-click on **Derived Values** and choose **Integration**, then **Surface Integration**. Then, choose your surfaces and enter the current distribution expression that you want to integrate.
Coco
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Posted: 4 years ago 2020年12月20日 GMT+1 13:53

Assuming you have already executed the model, go toResults, right-click onDerived Valuesand chooseIntegration, thenSurface Integration. Then, choose your surfaces and enter the current distribution expression that you want to integrate.

Oh,I know!So thanks. Did you use this way?Can I refer to the current distribution expression you have used? I don't know what form should be used.Looking forward to your answer. Next,I need find the current distribution expression.
>Assuming you have already executed the model, go to **Results**, right-click on **Derived Values** and choose **Integration**, then **Surface Integration**. Then, choose your surfaces and enter the current distribution expression that you want to integrate. Oh,I know!So thanks. Did you use this way?Can I refer to the current distribution expression you have used? I don't know what form should be used.Looking forward to your answer. Next,I need find the current distribution expression.
Robert Koslover Certified Consultant
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Posted: 4 years ago 2020年12月20日 GMT+1 18:04

The physics of your problem may impact your choice of expressions to use. I encourage you to work through some of the tutorial examples provided by Comsol. To obtain more specific advice for a particular problem, I suggest that you to post your model to the forum.

-------------------
Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara
The physics of your problem may impact your choice of expressions to use. I encourage you to work through some of the tutorial examples provided by Comsol. To obtain more specific advice for a particular problem, I suggest that you to post your model to the forum.

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

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