It is the factor that tells us how close the adiabatic wall enthalpy is to the total enthalpy at the upper the boundary of the viscous flow.
This category helps you to calculate the aerodynamics numerical like velocity, pressure, forces, fluid properties, etc., – WINGS OF AERO
adiabatic wall enthalpy defined as the enthalpy of the gas at the wall when the wall temperature is the adiabatic wall temperature—the wall the temperature when the wall becomes so…
It is a dimensionless number that represents the ratio of heat transfer coefficient to the heat capacity of the fluid.
The temperature profile in the boundary layer of a high-velocity gas flow over an adiabatic surface
It is an excellent approximation for the conceptual design of slender bodies in which the shock wave is in the vicinity of the surface of the body.