Keyur Kanade
Ansys Employee

this looks association problem. 

i suggest you reduce your problem to 120 degree and mesh only region around one blade. then you can assign periodics in fluent. 

also creating hex mesh for such turbine blade is tricky and you may need to do many splits for blocks and many associations as well. 




If this helps, please mark this post as 'Is Solution' to help others.

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