what is the surface roughness effect on DPM Wall Normal Pressure?

- May 31, 2022 at 5:24 am
  
  Narges
  Subscriber
  
  Hello there. I have a nanoparticle injection to water flow colliding a wall with 2micron roughness. I wonder if the surface roughness has an effect on "DPM Wall Normal Pressure" ?
- May 31, 2022 at 8:31 am
  
  Narges
  Subscriber
  
  in fact I want to know if the calculated Normal Pressure is normal to the wall or to the wall roughness. I will appreciate it if anyone can help. I couldn't find the answer in Ansys theory guide.
- June 24, 2022 at 10:00 am
  
  Rob
  Ansys Employee
  
  It'll probably be normal to the wall facet. Roughness is typically used for turbulence.

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