Boundary pressure in density based solver

- November 28, 2019 at 10:40 am
  
  YouwuApo
  Subscriber
  
  Hi,
  
  I'm writing an UDF and trying to access the pressure on a wall by using macro F_P() and this works fine in pressure based solver. But as far as I know, F_P() can not be used in density based solver. Is there any macro that can replace F_P() in density based solver? or other way to access wall face pressure?
- November 28, 2019 at 4:38 pm
  
  DrAmine
  Ansys Employee
  
  Access next cell value and doing extrapolation if needed.
- December 1, 2019 at 3:05 pm
  
  YouwuApo
  Subscriber
  
  Hi! Thank you for your reply. I tried to use pressure and the gradient of pressure on cell center to extrapolate pressure on face center. Macro C_P is available in density based solver. But I can’t access the gradient of pressure. I also tried to use C_R_G and C_T_G to solve pressure gradient with ideal gas equation but received an error message too. Do you have any recommended extrapolation method? Or where I could find a reference for pressure extrapolation in fluent?
  
  Best regards,
  
  Youwu
- December 2, 2019 at 6:04 am
  
  DrAmine
  Ansys Employee
  
  Check the customization manual to check how to access gradients

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