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Encounter an "undefine variable" when add a new probe

Posted Dec 20, 2021, 9:28 p.m. EST General, Acoustics & Vibrations 4 Replies

Junfeng Liang
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I am new to Comsol and trying to run someone's model.

In his model, a stationary study was used to define a series of local coordinate system along the gemotry and another frequency domain study was then used to compute the displacement and velocity. The model ran through without any problem.

Because I wanted to get the pressure in addition to the original results, I added a new surface probe and set the expression as "p". An error jumped out, which said I have an undefined variable. The variable is the e1X value of the coordinate system. I am confused because I think adding a probe should not change andy physic or definition. How could this happen?

4 Replies Last Post Dec 22, 2021, 10:13 a.m. EST
Edgar J. Kaiser Certified Consultant
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Posted: 3 years ago Dec 21, 2021, 3:14 a.m. EST

Junfeng,

you must update the solution to make the new probe available in post processing.

Cheers Edgar

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Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com
Junfeng, you must update the solution to make the new probe available in post processing. Cheers Edgar
Junfeng Liang
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Posted: 3 years ago Dec 21, 2021, 1:32 p.m. EST

The problem is when I tried to update the solution. I encounter the errors:

The problem is when I tried to update the solution. I encounter the errors:

Attachments:

Edgar J. Kaiser Certified Consultant
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Posted: 3 years ago Dec 22, 2021, 4:29 a.m. EST

Update solution doesn't mean update the plot. You find it in the 'Study' contect menu.

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Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com
Update solution doesn't mean update the plot. You find it in the 'Study' contect menu.
Junfeng Liang
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Posted: 3 years ago Dec 22, 2021, 10:13 a.m. EST

I did try both "compute" and "update solution" in the setting of the "study1" node. That was where the error came out. I then search for the "comp1.cc.e1X". I did find the definition under the curvilinear coordinate node (see the attachment).

I am comfused about the way COMSOL compile the nodes. Is there any way to debug the settings?

I did try both "compute" and "update solution" in the setting of the "study1" node. That was where the error came out. I then search for the "comp1.cc.e1X". I did find the definition under the curvilinear coordinate node (see the attachment). I am comfused about the way COMSOL compile the nodes. Is there any way to debug the settings?

Attachments:

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