.ClaRa_Obsolete.Components.Furnace.BaseClasses.HopperBase.ParticleMigration .ClaRa_Obsolete.Components.Furnace.BaseClasses.HopperBase.ParticleMigrationmodel ParticleMigration = ClaRa.Components.Furnace.GeneralTransportPhenomena.ParticleMigration.MeanMigrationSpeed;