function TwoPhaseFrictionMultiplier input SIadd.NonDim x_abs "Absolute quality"; input SI.DynamicViscosity mu_lsat "Liquid dynamic viscosity"; input SI.DynamicViscosity mu_vsat "Vapor dynamic viscosity"; input SI.Density rho_lsat "Liquid density"; input SI.Density rho_vsat "Vapor density"; output Real phi2 "Two-phase modifier"; end TwoPhaseFrictionMultiplier;