speed of sound as function of density and temperature
function velocityOfSound_props_dT extends Modelica.Icons.Function; input SI.Density d "density"; input SI.Temperature T "temperature"; input ThermalSeparation.Media.WaterBasedLiquid.BaseClasses.Common.IF97BaseTwoPhase aux "auxiliary record"; output SI.Velocity v_sound "speed of sound"; end velocityOfSound_props_dT;