• For rotor rotation we use the Multiple Reference Frame (MRF) method
• MRF method is based on adding source term into momentum equation
• Always applied on zone of cells
• MRF properties are set in constant/MRFProperties file:
  

   

zone1
{
    cellZone    rotor;
    active      yes;

    // Fixed patches (by default they 'move' with the MRF zone)
    nonRotatingPatches ();

    origin    (0 0 0);
    axis      (0 0 1);
    omega     constant 6.2831853;
}

• NOTE: The direction of rotation is given by the “right hand rule” that say if fingers on the right hand follow the direction of rotation, the thumb define the axis vector
• In the file constant/MRFProperties we can find the list of rotating zones
• In this case there is only one zone called rotor
• In section nonRotatingPatches we write list of patches, which are in the zone, but are not rotating
• origin is a point in the axis of rotation
• axis is the direction vector of rotation axis
• omega stands for revolutions per second (6.2831853 rad/s = 360 /s = 1 revs/s = 60 revs/min.)