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To account for the rotation of the mesh, we couldn't simply have created one single mesh. Instead, we have had to create sub regions, or Zones of meshing.

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The mesh created is "non-conformal", i.e. the nodes does not match across the interface), so we need to tell Fluent that the adjacent cell across that interface share information.

To make the "Interfaces" option appear, first go to "Boundary Conditions". Select the first Zone on the list, "blade_bot_in" and change the type to "Interface". Click OK the popped window to keep the default name.

FIGURE 5

Note that "Mesh Interfaces" option appear on the main menu to the left.

To save time in the future, you can already assign the other interfaces Boundary Conditions. There is no quick way to do that, as Fluent does not allow you to Copy Interfaces Boundary Conditions. So, proceed as before and assign the following Zones to Interface:

blade_bot_in

blade_bot_outer

blade_right_in

blade_right_outer

blade_top_in

blade_top_outer

hub_inner

hub_outer

Now we're ready to finally create the interfaces!

In our case, each pair of Interface Boundary Condition will be an Interface Zone. So there will be 4 zones in total.

Highlight "Mesh Interfaces" and click "Create/Edit..."

In the first box, "Mesh Interface", write "blade_bot". That's the name of the interface. No select as Interface Zone 1, blade_bot_in. For Interface Zone 2 select blade_bot_outer. Click "Create". The window will not close by it self, go ahead and close it.

Repeat this and create the remaining 3 interface zones.

Be careful to select the correct in-outer pairs!!

ADD MATCH CONTROL TO MESH? (see wind blade tutorial) 
Import mesh as a wbpz file instead o msh? 

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