Computational Fluid Dynamics

Playing with my new toy, CFD-simulation tool. Just figuring out what are the things I should and can do, and what I should not even concider.
Because aerodynamics is a whole new world, and you could spend your whole life with searching the right shape, I just kept it simple and created the basic quidelines which to follow. Here is one of the samples I have tested. Forward directional force is aprx. 7 Newtons @ 20m/s, this model is without a bubble.