.TRANSFORM.HeatExchangers.GenericDistributed_HX_withMass.DiffusionCoeff_wall .TRANSFORM.HeatExchangers.GenericDistributed_HX_withMass.DiffusionCoeff_wallDiffusion Coefficient
model DiffusionCoeff_wall = TRANSFORM.Media.ClosureModels.MassDiffusionCoefficient.Models.GenericCoefficient;