[igormoura]

Hi,
I'm trying to design a stirred reactor using ANSYS/Fluent, but I'm coming across a problem that I just can't find a solution.
Our reactor is being modelled as 2 zones: zone 1 is the outer cylinder (the reactor) and zone 2 is the shaft+blades removed from an inner cylinder. The problem is: in the contact zone between both zones, Fluent seems to be inconsistent. As you can see in the pictures below, the edges of the inner cylinder (the part that rotates) are pretty much detectable, as if it were a wall or a complete different body from the reactor. It is also possible to notice the velocity in the edges of the inner cylinder: it is faster "inside" the cylinder and "outside" it drops to almost 0 instantly.
Can anyone give me some advice? Any help will be very muchly appreciated

[aminem]

I had the same problem
Just try to refine your mesh at this boundary

[igormoura]

Hi, Amine, thanks for your reply!
Could you please send me a picture of your mesh? Just so I can see how refined is your mesh.
Thanks in advance.

[aminem]

you can make an inflation

[igormoura]

Thanks again for the reply. It might be a silly question, but how would an inflation make the contact interface any better? Should I inflate only the blades or the whole thing? Sorry for asking too much, I'm new to this software hehe

[aminem]

it's can ameliorate your velocity profile at the interface
you can done an inflation on both contact interface and blades