Discussion Forum

Cut Point 3D

I don't have access to Comsol at the moment, but look for this under the Data Sets node in Results.

Cut Point 3D can be used to add evaluation points at explicit coordinates, regardless of the underlying mesh.

Refer to page 926 in version 4.2 Multiphysics Users Guide pdf.

Fantastic! I was able to use the Cut Point 2D. For the posterity of the COMSOL community, here's what I did in COMSOL version 4.2.0.150:

1. After successfully running my model, I right clicked on "Data Sets" and chose to create a "Cut Point 2d" set.
2. I then changed my data set to the proper solution I wanted (necessary if multiple types of physics are being used).
3. I then changed my "Entry Method" to "From File."
4. This required me to produce a text file of x and y data points. I created a simple two column Excel table where my first column represented X and my second column represented Y. I saved the file as a text extension and chose "tab delimited" to further define how the file was saved. This was the file I used in the "Filename:" field. Note: your text document that you create can't include ANYTHING besides two columns for x and y. If you try putting in anything because specific points, COMSOL will get confused.
5. Next, I right clicked on Export within Results and selected Data.
6. Within the Data tab, I changed the data set to the Cut Point 2d set I was working on.
7. I set my factor of interest (I'm looking at the electric field so I used ec.normE).
8. Then I changed the units to compensate for any factor (M, k, milli, micro, etc).
9. I typed in a name for the data file to be called in the "Filename:" field.
10. Lastly, I right clicked on Data and selected export. This creates the file based on your (x,y) points.

Now, I was free to load my data into MATLAB, Excel, or whatever else tickled my fancy.
FYI, COMSOL seemed to have automatically used spaces delimited.

I hope this helps somebody out there in the world.

4. This required me to produce a text file of x and y data points. I created a simple two column Excel table where my first column represented X and my second column represented Y. I saved the file as a text extension and chose "tab delimited" to further define how the file was saved. This was the file I used in the "Filename:" field. Note: your text document that you create can't include ANYTHING besides two columns for x and y. If you try putting in anything because specific points, COMSOL will get confused.

Would you please attach one simple example of your created file for which you have explained no.4 point??

Than you too much for your suggestions.

Someone asked me to include an example file of step 4. This is where I create the file of data points that will be used in COMSOL.

Attached is a word document with screen shots and instructions as to how to create the file. I would have attached the text file, but COMSOL forums apparently doesn't allow that anymore, so I attached the Excel document shown in the word document.

Good luck.

Dear Ben Danziger

Thank you very much for your attachments. I would also like to provide my gratitude to your persional email adress directly.

Regards
Anwar
email: anwar.ee113@gmail.com