There are 3 regions in a boundary layer, namely, laminar, turbulent and transient boundary region.

Bernoulli's Equation states, for an ideal flowing fluid at any point sum of Total pressure energy and Gravitational energy remains constant.

Stationary fluid has Static pressure. Fluid in motion has Dynamic pressure. Total pressure or Stagnation pressure is summation of both.

When the speed of object is greater than the speed of sound, impact force acts on the object. These impact forces damage the objects.

Dynamic Pressure exists if there is some motion in fluid, or it has some velocity. Maximum Dynamic Pressure acting on rocket is "Max-Q"

When there is relative velocity between fluid and solid molecules, Aerodynamic force acts on the body.