[Evona]

Hi there!

I am in the process of modeling the flow rate produced by a HVAC fan and am having trouble with some details.

The details:

• The geometry involves the fan system in a cylinder fluid body with a small tip clearance.
  
• Geometry set up.jpg
  
  (Although Solidworks can't show it well, the fan blades actually have a uniform tip clearance of 6mm)
  
• The only details that I have been given are at follows:
  
• Fan speed 1463 RPM
• Fan Inlet/Outlet differential static pressure 160Pa

How should I approach this analysis in Fluent?

I understand that the differential static pressure is the difference in pressure between the inlet and the outlet but I cannot figure out how to apply this in Fluent.

Should I set the Inlet Boundary Conditions in Fluent to a "pressure-inlet" type, set the Gauge Total Pressure to -160Pa and do the same for the outlet but use atmospheric pressure instead?

And as for the rotation of the fan itself, am I right in saying this is done through settings in the Boundary Conditions of the fan body?
ie. Moving Wall, Rotational, Relative to Adjacent Cell Zones, Rotation-Axis Origin (0,0,0) and Rotation-Axis Direction (0,1,0)

Fan body rotation.PNG

Any help here would be fantastic!

Thanks