Have a look at "baffles" for guidance on the blade.Â
Re the mesh motion or frame motion, you will need the blade to move as the screw needs to actually rotate to move the liquid. You should find some videos around as they've been modelled before.Â
General advice is that you'll need to make sure to resolve the free surface and liquid amount so review dynamic adaption (mesh refinement and coarsening) which also has implications for the time step size. Have a very careful read up on the multiphase models and review the content on Learning & in the Fluent tutorials in Help.Â
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