Air-blast-atomizer azimuthal angle reference system and mass flow rate
ANSYS Fluent 18.2. I have to simulate a spray through a semicircular inlet (whose normal vector is axis -X) with a given flow rate of 1 kg/s on the whole circle (it's a symmetry-plane system). I guess I have to set start azimuthal angle to 0° but I don't know whether the stop azimuthal angle would be 180° or -180°. In other words, I don't know what is the reference system for rotation used by Fluent. The inlet half which will be crossed by the spray is the superior one.
Furthermore, which mass flow rate do I have to put in injection point properties? 1 kg/s or halved?