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Plotting chart on Coefficient of pressure vs angle (? = 0 to 360 degree) around a circular wall

- March 4, 2019 at 6:49 pm
  
  RafD47
  Subscriber
  
  hi,
  
  In fluent post processing i want to plot a curve Coefficient of pressure vs angle (θ = o to 360 degree) around the circular wall at certain distance from the nose of a sub marine shapes body. I don't know how to do it ? can anyone help me.
  
  TIA
- March 4, 2019 at 6:50 pm
  
  RafD47
  Subscriber
- March 4, 2019 at 8:02 pm
  
  RafD47
  Subscriber
- March 5, 2019 at 4:12 am
  
  Keyur Kanade
  Ansys Employee
  
  https://www.youtube.com/watch?v=Mv7w2PBkf8M
- March 15, 2019 at 1:22 pm
  
  RafD47
  Subscriber
  
  This isn't what i'm looking for. I know how to plot in cartesian co ordinate. But i want to plot in polar coordiante (0 to 360 degree). can you help me with that specific problem.
  
  TIA
- March 18, 2019 at 10:20 am
  
  Rob
  Forum Moderator
  
  You want to plot around the object, eg at a constant axial distance from the pointy end?
- March 18, 2019 at 12:08 pm
  
  RafD47
  Subscriber
  
  yes. that is what i'm looking for. Can you help me with my problem?
  
  TIA
- March 18, 2019 at 4:00 pm
  
  Rob
  Forum Moderator
  
  OK. Create an iso-surface at the correct axial position (iso surface of mesh) and make sure you select the wall(s) of the body when you do this. The surface you create will be a line on the wall at the mesh position you define: the explanation isn't overly clear but will make sense when you do it. You can then use the xy plots to show whatever against line position (possibly in cartesian co-ordinates unless you can also get radial position out of the system somehow: probably a function of x & y assuming z is axial).
- March 19, 2019 at 9:55 am
  
  RafD47
  Subscriber
  
  i have created the line on the wall. I want to plot it in Cp vs θ. but it allows me to plot Cp vs z. How can i use fuction to do so?
- March 19, 2019 at 10:32 am
  
  Rob
  Forum Moderator
  
  You should also be able to plot against length. To plot against angle you'll need two lines representing the two halves of the hoop (split on x or y axis) and create a custom function of inv_tan (x/y) & plot that to get the angle. Read up on iso-clips to create the lines.
- March 19, 2019 at 10:38 am
  
  RafD47
  Subscriber
  
  I don't get it. Can you explain it more elaborately. I'm new to ansys.

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