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Hydrodynamic entrance lengths of non‐newtonian laminar falling films
Author(s) -
Li Ruokang
Publication year - 1991
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450690147
Subject(s) - carreau fluid , laminar flow , falling (accident) , mechanics , shear thinning , newtonian fluid , non newtonian fluid , viscosity , power law , work (physics) , power law fluid , materials science , thermodynamics , physics , mathematics , medicine , statistics , environmental health
The Carreau viscosity model of the shear deformation is used to determine the hydrodynamic entrance length for falling liquid films emerging from a flat slit and flowing in a laminar fashion along an inclined flat plate. The present work enables the entrance‐length problem to be treated in a general form by choosing different values of the two parameters in the model. It is found that a significant difference exists between predicted results based on the power law model and the Carreau model when the fluid is pseudoplastic and the flow is decelerating.