When a fluid, like air, is moving at some velocity and "hits" or collides with a surface:
- If the surface is at an angle, the fluid will tend to be propelled in a similar direction (anything else?).
- If the surface is perpendicular, the fluid will tend to kind of splash out in all directions (anything else?).
For generally turbulent, laminar, or mixed flow conditions? The surface has mass and is relatively stationary for the purposes of this question.
In each of those scenarios, what are the (qualitative) local effects of physical properties like pressure, density, etc. for both turbulent or laminar flow conditions? Does the air-like fluid compress into a denser form and the local pressure increase where the fluid is coming in contact with the surface?