Please correct me if I am wrong, but my understanding is that the point which you choose for ‘Center of Rotation’ in the ‘Force and moments’ results is that it can be defined anywhere in the whole coordinate system. I think of the force and moments results that we get are simply the force and moments that would have to be applied at that point to hold the geometry selected in ‘Forces and moments’ at that time interval. I know this would require some invisible, rigid, mass-less structure that connected that point to the geometry selected, but once you have the results for that point, you can just translate the moments to some other point that actually holds those faces in real structure that is missing from the CAD (no support structure for rotor).
I put that point at the ‘center point of the MRF volume’ and in doing so it led me to my ‘Where to go from here’ question about moments that have to be applied about that ‘center of rotation’ and my query about why there are z and y axis moments when intuitively, my brains says those should be close to zero about that center point…
These moments are not fluctuations but are pretty stable through the last few hundred time steps as you can see in my images.
I will also additionally bring the rotational speed up parabolically in a yet to be, Run 3…