Hi everyone! I hope you are well. My experience in 3d modeling is about 2 days long so far. I am trying to create a tourbine of my one design which needs to have grooves on the interior surfaces to create certain paths for the developing currents of air and work as a kind of guide for the air passing through.
I have attached a picture of a certical crossection of the tourbine. It consists of mainly two compartments, upper and lower. In the interior walls of the lower compartment I want to create protruding like grooves that at the topmost part of that compartment they are tight and with a quick helical step and as they travel to the lower end they gradually but quickly become perpendicular to the direction of the first coils in the upper part.
I have tried to make a line pathway on the model to give you a rough idea of how the grooves must look like, but I can not sketch against the curved interior walls. So this line sketch is only for helping you understand the rough goal.
So I guess my question is: How do I create a helical pathway that can be variable in radius and for the radius to be determined by the walls of a curved object? And then to make that pathway into a feature that can be made into a protruding groove from the surface of that curved wall. It also needs to be able to be parametrically modified, because the grooves need to be tighened or relaxed with high precision, something I cannot do by hand.
I hope this all is enough to carry across my issue. Thank you all in advance!
Note: In the image above you can see the model cut exactly in half. So imagine that it's a barrel like type of structure.
This is how it looks from the top:
And this is how it looks from the bottom:
Last thing I would like to ask, I might need to do the same for some exterior surfaces (as in convex and concave, too). I imagine there is not going to be any difference to the method I'll need to use for either surfaces. Correct?