Okay i got your points , but for more clarity please tell
1. What is the problem with outflow boundary condition , which boundary condition you suggest , will initialization will be different for it. i mean in pressure outlet (radial pressure equilibrium) can i safely use standard or hybrid initialization
2. Can we conclude that 1 cell thick sector is not possible without high skewness and low orthogonality ?
Also how much larger sector i should aim for , If i go for large sector then i can't have one cell thick domain as cells at the periphery be so large that will become problematic.