.TRANSFORM.HeatAndMassTransfer.DiscritizedModels.HMTransfer_2D.DiffusionCoeff .TRANSFORM.HeatAndMassTransfer.DiscritizedModels.HMTransfer_2D.DiffusionCoeffDiffusion Coefficient
model DiffusionCoeff = TRANSFORM.Media.ClosureModels.MassDiffusionCoefficient.Models.GenericCoefficient;