Ah yes i forgot about that part.
So a couple of things first to improve your geometry.
- In simulation, anything that does not impact result performance should be removed, mainly small features, so your attachment hinges should be deleted.
This flap should then be tight to the hull. although im not sure what the purpose of this flap is, as i would think this in itself would cause massive amounts of drag
For this flap … same thing, remove the hinges. Also the geometry should not have any tersections (top arrow) or
Gaps. The small face poking out (middle arrow) should also be removed. This small face isnt detrimental to the mesh it is just better to fix things like this so your not searching for a potential error later.
For the overall concept other then the flap jetting out into the water under the hull it looks good! The upper blue flap doesnt seem to serve a purpose as the water will come out between the vertical slats. you can probably just delete this whole thing. Also, at the stern where i assume your propeller hole is, the hole is above the bottom of the hull and there will be water just sitting in this area. Maybe lower hole or step up the rear of the boat to match the propeller height (in red)
For modeling the propeller you can also do one of two things.
- add the propeller geometry with a rotating wall condition . Then add a MRF zone
- The Simpler method that will use less resources - create a momentum source where the propeller should be.
Is this what you meant with concept?
I forgot to mention. To reduce mesh requirements its better to just close the hull completely on the top. Otherwise you are meshing the outside and inside walls, which will just waste core hours.