The Mach number (Ma) in terms of the velocity of the upper plate (ue) and the local speed of sound in the fluid (c or sometimes denoted as a). It applies to compressible flow situations where the density of the fluid changes significantly due to variations in pressure and temperature.
- Me: Mach number (dimensionless).
- ue: Velocity of the upper plate (in m/s).
- γ: Adiabatic index
- R: Specific gas constant for the fluid (in J/(kg·K)).
- Te: Local temperature of the fluid at the edge or boundary layer (in K).