19namespace PhysicalConstant
48constexpr double Water = 0.018016;
59constexpr double N2 = 0.028013;
70constexpr double O2 = 0.032;
77constexpr double Air = 0.02897;
84constexpr double H2 = 0.002016;
92namespace SpecificGasConstant
102namespace HenryConstant
constexpr double HenryConstantH2
constexpr double N2
kg mol-1
constexpr double Air
kg mol-1
constexpr double H2
kg mol-1
constexpr double O2
kg mol-1
constexpr double Water
kg mol-1
constexpr double WaterVapour
Specific gas constant for water vapour.
constexpr double CelsiusZeroInKelvin
Zero degrees Celsius in Kelvin.
constexpr double IdealGasConstant