residual stuck at the same time
 

hi there,
I am running a VAWT case using pimpleFoam and I got stuck at a residual and it's running the same time over and over and if i changed the moment of inertia in dynamicMeshdict it goes stuck too but at different time, I think I have a problem with fvsolution that makes it like that.
note that i am using adjustableRunTime in the controldict.
and is there any way to fasten the simulation ruther than changing the moment of inertia?