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Generalized slit flow of an ellis fluid
Author(s) -
Steller Ryszard T.
Publication year - 2001
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.10883
Subject(s) - planar , curvature , mechanics , slit , power law fluid , flow (mathematics) , newtonian fluid , non newtonian fluid , isothermal process , classical mechanics , transverse plane , power law , fluid dynamics , physics , materials science , optics , thermodynamics , geometry , mathematics , computer science , computer graphics (images) , structural engineering , statistics , engineering
Isothermal, steady‐state and fully developed flows of Ellis fluids in planar and annular slits are discussed. The flow equations derived for Ellis fluids describe also the flows of Newtonian and power law fluids as specific cases. The most important flows resulting from thp general theory, i.e., the pressure flows in flat and annular slits for stationary channel walls and at transverse and longitudinal movements of a wall, are analyzed in detail. Numerical verification of the results leads to the conclusion that the planar and annular flows of Ellis and power law fluids are qualitatively similar The quantitative differences resulting from the slit curvature and the type of constitutive equation are relatively large only for flows of strongly non‐New‐tonian liquids.