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Unsteady two‐film model for mass transfer
Author(s) -
Wang Jinfu,
Langemann Horst
Publication year - 1994
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.270170410
Subject(s) - mass transfer , penetration (warfare) , boundary layer , mechanics , boundary value problem , boundary (topology) , diffusion , steady state (chemistry) , thermodynamics , materials science , fluid dynamics , chemistry , physics , mathematics , mathematical analysis , quantum mechanics , operations research
The classical two‐film model for mass transfer between two fluid phases can only be used to describe the steady state mass transfer mechanism. Both the penetration and the film‐penetration model are also valid solely when only one diffusion boundary layer exists at the interface between the phases. With a view to surmounting the limitations of the above models a new model has been developed for the mass transfer between two fluid phases with two diffusion boundary layers at the interface. The new model is based on the two‐film concept and the Danckwerts distribution function, and is also able to simulate the unsteady state mass transfer mechanism between two fluid phases with two different boundary layers.