[CFX][Setup] Cyl. Vel. Components

- November 25, 2020 at 11:20 am
  
  betteroden
  Subscriber
  
  I have 3 inlet fans spinning at 1500 RPM ( =25 Rounds Per Seconds )
  Pushing 250 [m^3/h] { 250/(60*60) *1.204 ~ 0.084 kg/s }
  "1.204 is the air dencity at 20 degrees C"
  
  I have 3 Coordinate systems, one for each fan!
  I just want to understand what values are required for:
  Axial component
  Radial Component
  Theta Component
  Is axial the velocity of the outer edge of the fan?
  Radial should be 0
  Theta is radians per second for the outer edge of the fan?
  
  Thank you in advance :)
- November 25, 2020 at 12:24 pm
  
  betteroden
  Subscriber
  
  Also what isninlet 1.1ninlet 1.2ninlet 1.3nis it:ninlet 1.1 = xninlet 1.2 = yninlet 1.3 = zn
- November 25, 2020 at 1:50 pm
  
  DrAmine
  Ansys Employee
  
  If you have already defined your local coordinate systems why not directly using them in the boundary specification?n
- November 25, 2020 at 2:03 pm
  
  betteroden
  Subscriber
  
  If you have already defined your local coordinate systems why not directly using them in the boundary specification?https://forum.ansys.com/discussion/comment/98365#Comment_98365
  No idea what you mean !nI want to know:nn' Axial componentnRadial ComponentnTheta ComponentnIs axial the velocity of the outer edge of the fan?nRadial should be 0nTheta is radians per second for the outer edge of the fan? 'nnandnn' Also what isninlet 1.1ninlet 1.2ninlet 1.3nis it:ninlet 1.1 = xninlet 1.2 = yninlet 1.3 = z 'nnEdit*nI can not find a single place on the internet that talks about those! n
- November 25, 2020 at 4:05 pm
  
  DrAmine
  Ansys Employee
  
  1.3 will correspond to the local z axis. So that will be your local axis of rotation.n
- November 25, 2020 at 7:49 pm
  
  betteroden
  Subscriber
  
  1.3 will correspond to the "local z" axis. So that will be your local axis of rotation.https://forum.ansys.com/discussion/comment/98399#Comment_98399
  thank you, now I have one question answered !nOne to go!n
- November 27, 2020 at 9:05 am
  
  betteroden
  Subscriber
  
  Bump n
- November 27, 2020 at 11:57 am
  
  DrAmine
  Ansys Employee
  
  Theta Velocity Component is the velocity component in circumferential direction and this is meter per second: Velocity dimension.n
- December 1, 2020 at 2:09 am
  
  betteroden
  Subscriber
  
  Theta Velocity Component is the velocity component in circumferential direction and this is meter per second: Velocity dimension.https://forum.ansys.com/discussion/comment/98558#Comment_98558
  that's the Axial component! nif not then the axial and theta is the same!!!n
- December 1, 2020 at 7:45 am
  
  DrAmine
  Ansys Employee
  
  https://forum.ansys.com/discussion/comment/98558#Comment_98558that's the Axial component! if not then the axial and theta is the same!!!https://forum.ansys.com/discussion/comment/98858#Comment_98858
  ?n

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