# Modeling of a HVAC Fan

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 May 1, 2013, 03:15 Modeling of a HVAC Fan #1 New Member   Join Date: Apr 2013 Posts: 2 Rep Power: 0 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 Last edited by Evona; May 1, 2013 at 04:02.

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