To extract data over a circle
 

I am new to Tecplot. I have a 3D annulus geometry. I want the temperatures across the circumference of a circle at a specified radius. Can someone please help me?

Have you solved the problem? I hope I can get the solution. Thank you

One option is to compute a 'radius' variable using Data>Alter>Specify Equations.

For example:
{radius} = sqrt(X*X+Y*Y)

Then do the following:
1) Create an iso-surface based on 'radius'.
2) Extract the iso-surface to a new zone
3) Activate only the new iso-surface zone
4) Create a slice at Z=nnn, ensuring that the slice cuts through surface data.
5) Extract the slice to a new zone

This will leave you with line data at a specific 'radius' and 'z' location.

I hope this helps.

Thank you very much for your comments

Dear Scott,

I have been trying to extract data over a circle in 2D using tecplot similar to polyline extraction. Is it not possible? How may I do the data extraction along a curved surface?

Could you please tell me how did you do that? I need to extract data from the cylinder edge in 2D. TIA

In the 2D case you can Extract Contour Lines.

1) Create the radius variable: {radius} = sqrt(x*x+y*y)
2) Toggle on Contour on the Plot sidebar
3) In the Zone Style dialog, change "Contour Type" to "Lines"
4) In the "Contour & Multi-Coloring Details" dialog adjust the "Contour levels" to show the value (or values) you're interested in.
5) Use "Data>Extract>Contour Lines"

This should result in a new FE-Line Segment zone. As of 360 2022 R2, you cannot extract contour lines from Polyhedral data however.

I hope this helps.
Scott

Thank you a lot. I will try tomorrow for sure.