30.11 Reference Values

You can control the reference values that are used in the computation of derived physical quantities and nondimensional coefficients. These reference values are used only for postprocessing.

Some examples of the use of reference values include the following:

• Force coefficients use the reference area, density, and velocity. In addition, the pressure force calculation uses the reference pressure.

• Moment coefficients use the reference length, area, density and velocity. In addition, the pressure force calculation uses the reference pressure.

• Reynolds number uses the reference length, density, and viscosity.

• Pressure and total pressure coefficients use the reference pressure, density, and velocity.

• Entropy uses the reference density, pressure, and temperature.

• Skin friction coefficient uses the reference density and velocity.

• Heat transfer coefficient uses the reference temperature.

• Turbomachinery efficiency calculations use the ratio of specific heats.