Calculate temperature gradient across user defined surface

- June 15, 2020 at 5:20 pm
  
  Spencejo
  Subscriber
  
  Hi all,
  
  I am running a simulation on an air device chamber with a cylindrical annular space. I am trying to export the temperature gradient across a cross-sectional plane of the chamber. I have created the surface (pictured below), and I am wondering how to create the report definition so that the temperature across surface is exported, not just the average temperature of the surface. What would be the best way to implement this? Thanks!
  
  -Spencer
- June 17, 2020 at 1:03 am
  
  Karthik Remella
  Administrator
  
  Are you attempting to compute the temperature gradient across the thickness of the tube?
  
  Thanks.
  
  Karthik
- June 17, 2020 at 1:09 am
  
  Spencejo
  Subscriber
  
  That is correct Karthik, I would like to see the gradient along the thickness of the tube.
- June 17, 2020 at 1:32 pm
  
  Karthik Remella
  Administrator
  
  Hello,
  
  You can use the iso-surface tool. You should be the 'From Surface' feature to create the lines you need.
  
  For example, you can select the 'outer wall' in the 'From Surface' and draw an iso-surface of Mesh 'Y-Coordinate' to get a line on the outer wall.
  
  Similarly, you can select the 'inner solid wall' in the 'from surface' list and repeat the process at the same Y-coordinate. You will get another line on the inner wall.
  
  Once you have the lines, you should be able to write out the temperature along these lines and get your gradient.
  
  I hope this helps.
  
  Karthik
- June 17, 2020 at 2:42 pm
  
  Spencejo
  Subscriber
  
  Hi Karthik,
  
  Thanks for the responses! I now have the surface you described created. What would be the best way to write out the temperature values? I am looking in the Report Definitions and I only see options to write out the average temperature across the surface, not the individual values of the gradient. I apologize, I am fairly new to Fluent. Thanks!
  
  -Spencer
- June 17, 2020 at 4:13 pm
  
  Karthik Remella
  Administrator
  
  Hello,
  
  Please try XY plot. You should have a write option there. The idea is to write out the temperature along both these lines and then estimate the gradient outside Fluent.
  
  I hope this helps.
  
  If any of the answers were useful, please mark them as 'Is Solution' to benefit others on the community.
  
  Thanks.
  
  Karthik
- June 17, 2020 at 4:14 pm
  
  Spencejo
  Subscriber
  
  I will give that a try, thanks so much.
  
  -Spencer