What is the Coanda effect and how does it work?
You are right about the Coanda effect not being very well documented, perhaps because it is a special case of Bernoulli principle. However, here is a quick primer on it. A fluid flowing tangentially on a surface will follow this surface even if it curve away from it. Imagine you blowing air on the surface of a table, when the air reaches the end of the table, some air will flow *down* along the vertical edge. If you blow air strongly enough, that air will also drag air from above in the same direction as well. All this moving air will create a zone of low pressure (air moving fast drops pressure) and this in turn will create lift. Basically, you can lift an object by blowing air on it! This is actually used in the industry to pick up microchips without actually touching them (which could damage the fragile microcircuit). Coanda effect is also used as a lift augmentation system, where engines placed high above the wing blow air on the upper surface of the wing, which then gets deflected
