drag coefficient

- February 16, 2020 at 2:59 pm
  
  BENAMORAHMED
  Subscriber
  
  i work on flow over a rotating cylinder ,i calculated the total drag and lift coefficients but i don't now how to calculate pressure drag (Cdp) and friction drag
  
  (Cdf) coefficients.
  
  i want to now if ansys contain a function to calculate them or what i should do
- February 16, 2020 at 10:02 pm
  
  José Mantovani
  Subscriber
  
  Hello. I think that you need create a function in order to match with your hand calculations, also create variables. It can be made easily in CFD Post.
  
  Mantovani.
- February 17, 2020 at 6:09 am
  
  Keyur Kanade
  Ansys Employee
  
  In Fluent, please set the reference values and then go to results - forces to print it.
  
  You can also do it in CFD Post.
  
  Pressure drag can be obtained from the Function Calculator by integrating the total pressure with area at the flow direction, i.e. using Function: areaInt and Variable: Total Pressure. Friction drag is obtained by integrating the wall shear with area at the flow direction, i.e. using Function: areaInt and Variable: Wall Shear.