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Inadequacy of the Two‐Fluid Formulation to Model Forced Periodic Flow in Trickle Beds
Author(s) -
Kostoglou M.,
Karabelas A. J.
Publication year - 2006
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.200500315
Subject(s) - flow (mathematics) , transient flow , mechanics , transient (computer programming) , phenomenological model , fluid dynamics , statistical physics , thermodynamics , physics , mathematics , computer science , meteorology , statistics , surge , operating system
It is shown that the well‐known two‐fluid model, despite its success in quite a few steady and transient two‐phase flows, is inherently incapable of modeling the evolution of forced periodic trickling flow of relatively high frequency; the latter, which is of practical significance, is dealt with in a recent experimental study by Giakoumakis et al. The above conclusion is based on physical arguments and results of theoretical analysis using computational tools. The alternative approach, emerging in the literature, of using purely phenomenological models to interpret the experimental results is also discussed.