If the species is incompressible then p(T, v) is undefined, and the function will return a value of zero.
The derivative of this function is dp_Tv().
function p_Tv
import FCSys.Utilities.Polynomial;
extends Modelica.Icons.Function;
input Q.TemperatureAbsolute T = 298.15*U.K "Temperature" annotation(
Dialog(__Dymola_label = "<html><i>T</i></html>"));
input Q.VolumeSpecificAbsolute v = 298.15*U.K/p0 "Specific volume" annotation(
Dialog(__Dymola_label = "<html><i>v</i></html>"));
output Q.PressureAbsolute p "Pressure" annotation(
Dialog(__Dymola_label = "<html><i>p</i></html>"));
end p_Tv;