Improving mesh
 

Hi everyone, I'm currently in the midst of redo-ing my meshing however I have encountered a problem that I would like to seek for your help. Below are the details:

Pictures shows the mesh that I have done up with my geometry. I understand that multi-zone and sweep function would enable me to obtain a better quality mesh however ANSYS Meshing does not allow me to select either the multi-zone and sweep function for my geometry. I also did up using Tetra however the skewness level was above 0.99 and I was unable to obtain a residual value of -0.4 for continuity.

Hence, do you guys have any solutions/advice to create a better mesh for such geometry? Or Is there any way for me to use the multi-zone of sweep function for my geometry?

Thank you in advance!