Display Y+ in cfd-post

- May 8, 2020 at 9:54 pm
  
  authentic987
  Subscriber
  
  Hi everyone! I'm looking to learn more about turbulence and I read about the Y+ value, but I can't find it. I did a simple case with k-e enabled, processed it in fluent and trying to plot it in cfd-post.
- May 11, 2020 at 2:11 pm
  
  RK
  Ansys Employee
  
  Hello,
  
  If you want to know about Y+, there are many sources online or you can pick up any text book on boundary layers and you will find a detailed explanation.
  
  You can also refer to this thread on the community for more information.
  
  /forum/forums/topic/neat-wall-tratment/
- May 11, 2020 at 3:01 pm
  
  authentic987
  Subscriber
  
  Hello Rahul,
  
  Thank you, it was really helpful!
  
  I still can't find the variable in cfd-post though, any thoughts?
  
  Greetings, Ignacio
- May 11, 2020 at 5:22 pm
  
  singh33
  Subscriber
  
  Hello,
  
  I do not know how to plot it in CFD-POST, but you can do it like that before you run the simulation go to reports then select the area-weighted average of Y+ and select the surface of the problem domain on which you want to plot the Y+, then enable the report-plot and report-file option. Now Fluent will automatically write a *.txt file with an extension ".out" which contains Y+ value at each and every iteration and also the plot of the Y+ at each iteration will be plotted on the screen.
  
  Now for your with your *.txt file, you can convert it into Excel and then plot the data easily or you can import the excel file into CFD-POST to the same. The plot you get is Y+ v/s iterations if you want Y+ value at different points of the surface, you have to write a scheme file to generate the different surface and then to calculate the values to extract. This is what I have done.
  
  Thanks and Regards.
- May 12, 2020 at 1:08 am
  
  Karthik Remella
  Administrator
  
  Hello,
  
  You should be able to export the Wall Yplus results. In Fluent (standalone or in WB), go to File -> Export -> Solution Data. Change 'File Type' to CDAT for 'CFD-Post & EnSight'. Select all Data Quantities including 'Wall YPlus'. Write these Files and open this file in CFD Post. You should be able to see Wall YPlus data in CFD Post.
  
  I hope this helps.
  
  Best,
  
  Karthik
- May 12, 2020 at 10:30 pm
  
  mutlaq404
  Subscriber
  
  Mr. Kremella if you can answer my question plz?
  
  the value of y+ appears very very small in fluent like 0.41 or 0.174 how can i solve this?