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-Cell zone conditions (here is where we specify that we want the sliding mesh. Remember that we selected "Frame Motion"? Now we will copy that info into the Mesh Motion tab) option)

-- For "inner", click edit and then click copy to mesh motion. Go into the tab and check that the rotation speed (relative to correct zone) and has been transferred.

-- For each fluid-blade zone, "Copy to Mesh Motion". Move to mesh motion tab and check that the origin and angular velocity were transferred. 

--For all three blades, the motion should be relative to the "inner" zone. Therefore each blade will not only rotate about its own axis, but also its axis will translate to follow the motion of the hub (called "inner" here).

If you get an error saying that no interface zones were created, launch fluent from Setup in MFR, re-assign the interfaces and run the simulation again.

Go to Step 5: Numerical Solution

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