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Why are certain regions not applicable?

Posted 2024年12月1日 GMT+8 03:50 4 Replies

Bublee Das University of Maryland- College Park
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Hello, I am trying to simulate a circular/arc type 3-electrode electrochemical sensor. I am trying to assign Secondary current distribution>Electrode surface to certain regions and I have them selected, but for some reason those are not applicable. Could someone please help me out? I am very new to COMSOL and our professor just threw this project at us. I am attaching the file for reference.

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4 Replies Last Post 2024年12月4日 GMT+8 22:48
Magnus Ringh COMSOL Employee

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Posted: 6 months ago 2024年12月2日 GMT+8 16:06
Updated: 6 months ago 2024年12月2日 GMT+8 16:06

Hi Bublee,

The reason why domains 1 and 5, and associate boundaries, are not applicable is that the main Secondary Current Distribution interface is not active in those domains. I assume that it's intentional, and the boundaries of the secondary current distribution's potentials are then the boundaries of the included domains only. In the most recent version of COMSOL Multiphysics, version 6.3, there is an Only Show Applicable checkbox that removes all inapplicable geometric entities (boundaries) from the selection lists in a physics feature. That can make it easier to see for which boundaries, for example, a boundary condition will be applied.

Best regards, Magnus

Hi Bublee, The reason why domains 1 and 5, and associate boundaries, are not applicable is that the main Secondary Current Distribution interface is not active in those domains. I assume that it's intentional, and the boundaries of the secondary current distribution's potentials are then the boundaries of the included domains only. In the most recent version of COMSOL Multiphysics, version 6.3, there is an Only Show Applicable checkbox that removes all inapplicable geometric entities (boundaries) from the selection lists in a physics feature. That can make it easier to see for which boundaries, for example, a boundary condition will be applied. Best regards, Magnus
Robert Koslover Certified Consultant
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Posted: 6 months ago 2024年12月3日 GMT+8 07:38
Updated: 6 months ago 2024年12月3日 GMT+8 07:38

Hi Magnus. OK, I have version 6.3. Where in the interface can I find the "Only Show Applicable" checkbox? Thanks!

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Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara
Hi Magnus. OK, I have version 6.3. *Where* in the interface can I find the "Only Show Applicable" checkbox? Thanks!
Magnus Ringh COMSOL Employee

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Posted: 6 months ago 2024年12月3日 GMT+8 16:39

Hi Robert,

Sorry, I was wrong. It's a button, located to the right of the list of geometric entities (such as boundaries) in the Boundary Selection (Domain Selection, ...) section for physics features.

Best regards,

Magnus

Hi Robert, Sorry, I was wrong. It's a button, located to the right of the list of geometric entities (such as boundaries) in the Boundary Selection (Domain Selection, ...) section for physics features. Best regards, Magnus
Robert Koslover Certified Consultant
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Posted: 6 months ago 2024年12月4日 GMT+8 22:48

Found it. Thank you, Magnus.

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Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara
Found it. Thank you, Magnus.

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