u represents the velocity of the object or fluid flow. It’s the speed at which the object is moving through the medium. In the context of supersonic flow, “u” represents the velocity of the object or flow relative to the medium, which can exceed the speed of sound.
- Speed of sound (a) in m/s
- Specific heat ratio (𝛾)
- Ratio of total pressure to the static pressure (p0/p)
- Speed of an object (u) in m/s