Dynamic Pressure

The difference between the total and static pressure, which represents the kinetic energy of the flowing fluid. Dynamic pressure is a function of the fluid velocity and its density and can be calculated from:

where P_dynamic is dynamic pressure, lb_f/in.²; ρ is density, lb_m/ft.³; and v is velocity, ft./sec.

Note that the equation above is expressed in US units. If calculating P_dynamic in Metric units (Pascals), the acceleration of gravity (g) can be omitted.