In a Pitot tube, the flow velocity () refers to the velocity of the fluid in a subsonic flow field at a specific point where the Pitot tube is positioned. The Pitot tube is a device used to measure the total pressure of a flowing fluid. In subsonic flow, the velocity of the fluid is much less than the speed of sound.
- Flow velocity (u1) in m/s
- Freestream speed of sound (a1) in m/s
- Specific heat ratio (γ)
- Pitot pressure (p0,1) in N/m^2
- Static pressure (p1) in N/m^2