The pressure coefficient on the lower surface (Cp,l) is a dimensionless quantity that measures the relative pressure difference between a point on the lower surface of a body and the free-stream pressure in a fluid flow field. The pressure coefficient on the lower surface can be used to calculate the aerodynamic forces and moments acting on the body in various flow regimes, such as subsonic, supersonic, or hypersonic flows.
- Pressure coefficient on the lower surface (Cp,l)
- Angle of attack (𝛼) in rad