Assuming something happens in the flow cells on the rotor when they're not connected to the flow ports I'd probably go with the 1 cell thick annular pseudo 2d option, second image above. Not least as I can't see any symmetry or repeated section in the stator. With 2023R2 I think Student is good for 1M cells, and I'd expect most laptops to have 4-8GB RAM and 4 useable cores so all good. Overall run duration then comes down to how big the time step is and how long a duration is required.
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