The pressure coefficient, often denoted as , is a dimensionless parameter used in fluid dynamics and aerodynamics to describe the variation in pressure at a specific point in a fluid flow, typically around an object or an airfoil, relative to the freestream pressure. quantifies how the local pressure at a specific point in the flow compares to the freestream pressure. A positive indicates that the local pressure is higher than the freestream pressure, while a negative indicates that the local pressure is lower than the freestream pressure.
- Pressure coefficient (Cp)
- Freestream pressure (p∞) in N/m^2
- Static pressure (p) in N/m^2
- Freestream Mach number (M∞)
- Specific heat ratio (γ)