With a coarser mesh applied to the fluid domain (air) of  50mm. 

Added inflation layers at the top and bottom boundaries. 

Default transition ratio 0.1.

Maximum layers of 20.

Growth rate 1.2.

Added two spheres of influence. One 400mm the other 

300mm of 10mm element size.

Unstructured tetrahedral meshes.

Using ANSYS fluent. This is a more accurate solution than my first. 

Only noticed this when i increased my upstream domain length. Adjusted that 

with various attempts to find that about 1.5m is sufficient for entry length. 

Now i think I need to refine my meshes some more 

for the literature review and report submission due 

end of week 7.