Convergence problem in Ansys
 

Dear All,
I am using Ansys. I have a fluid domain with the integration of six individual parts. Mesh statistics in solver shows that orthogonality angle is 21.6, aspect ratio is 36.6 and expansion ratio is 333.6. In solver itself, the expansion ratio of mesh shows 333.6!(not good one). I don't know whether this is the reason for the run is not converging or some other reason behind it.Because I am dealing with the simple flow analysis problem. Kindly can anyone help me to do the necessary steps for easy convergence.