Setting 'Reference Values'?
 

Hi, I'm attempting to simulate a scaled model I have in a 'low speed' wind tunnel.

I've set up Fluent with; Inlet Velocity & Outlet Pressure. Outlet set to 0 Pa i.e gauge pressure. My query is what I should set the pressure to in 'reference Values'?

Should it be set to 1 atmosphere i.e. 101325 Pa? Also under; Define>Operating Conditions, should I include gravity? (Haven't seen this done in any tutorials). Thanks in advance...

Reference value are used to calculate quantities in report like drag coefficient.And gravity sets body force in z-direction as -rho*g.Its generally used if your flow is affected by gravity like water flowing down a pipe.In case you want to use gravity model have to be prepaid properly with xy plane as horizontal and z as height.