[u_k]

Hello can anyone please help me,
I am trying to mesh a pipe geometry (pic 1), which consists of two elbows (lower and upper, S shape pipe, ) in Ansys Icem.

Problem_1 --> For better quality i had created an O-grid which resulted in distorted edges in a zig zag shape in both elbows(upper and lower elbows, can be seen in the pictures i.e pic 2 & 3). Please suggest me anything for it.

Problem_2--> After fixing it manually using moving vertices, the quality somehow improved but cannot be improved further due to bad elements lying in the geometry (shown in pic 4).

It would be really generous and kind of you if some one can suggest me anything Please. I have been trying for one week and tried everything but cannot improve the quality. Since i have to do grid independence study on this geometry. PLEASE help me out