Calculates the water vapour diffusion coefficient
function myPhiMoist input BuildingSystems.Types.RelativeHumidity myTabX[:]; input BuildingSystems.Types.WaterVapourDiffusionResistance myTabY[:]; input BuildingSystems.Types.WaterVapourDiffusionResistance myDry; input BuildingSystems.Types.RelativeHumidity phi; output BuildingSystems.Types.WaterVapourDiffusionResistance value; end myPhiMoist;