3 ms·
on the one hand, this is clearly a 2D simplification of a 3D problem. on the other... if you imagine your spiral as projecting outward a non-infinite distance,
by ledauphin 6y ago
on the one hand, this is clearly a 2D simplification of a 3D problem.
on the other... if you imagine your spiral as projecting outward a non-infinite distance, how could it possibly "trap" air? the air would flow toward (and away from) the viewing plane very quickly.
- mojuba 6y agoYes but surely concavities with trapped air are possible in real life? Not necessarily in the form of a spiral.