# To extract data over a circle

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 April 19, 2016, 08:29 To extract data over a circle #1 New Member   kartik Join Date: Apr 2016 Posts: 2 Rep Power: 0 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?

 December 2, 2019, 00:22 #2 New Member   Hongye Ma Join Date: Jun 2019 Posts: 2 Rep Power: 0 Have you solved the problem? I hope I can get the solution. Thank you

 December 9, 2019, 14:06 #3 Senior Member   Scott Fowler Join Date: May 2009 Posts: 119 Rep Power: 17 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. WeiZhenjiang likes this.

 December 10, 2019, 08:21 #4 New Member   Hongye Ma Join Date: Jun 2019 Posts: 2 Rep Power: 0 Thank you very much for your comments

 July 25, 2020, 10:44 #5 New Member   damu Join Date: Feb 2017 Posts: 24 Rep Power: 9 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?

March 15, 2023, 07:34
#6
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MD KAWSAR SAJIB
Join Date: Jul 2022
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Rep Power: 3
Quote:
 Originally Posted by damu1414 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

 March 15, 2023, 12:01 #7 Senior Member   Scott Fowler Join Date: May 2009 Posts: 119 Rep Power: 17 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

March 15, 2023, 13:18
#8
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MD KAWSAR SAJIB
Join Date: Jul 2022
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Quote:
 Originally Posted by wsfowler 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.

 Tags circle, data