Die Änderung der Wärme- und Stoffübergangskoeffizienten beim gleichzeitigen Wärme- und Stoffübergang

The values of sensible and latent heat and of the resulting energy flow through laminar boundary layer have been developed for the four possible combinations of the directions of heat- and mass flows. When the values of heat- and mass flows are used with the correct sign according to the definitions of Fourier's law and Pick's law, the changes of heat transfer- and mass transfer coefficients can be described by one equation alone for all cases. The equations are extended in that way that they are valid for arbitrary cases of countercurrent diffusing mass flows — not only for the well known case of Stefan diffusion.