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Simulation of Vortex growth in planar entry flow of a viscoelastic fluid
Author(s) -
Mitsoulis E.,
Vlachopoulos J.,
Mirza F. A.
Publication year - 1985
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1985.070300405
Subject(s) - viscoelasticity , vortex , rheology , mechanics , newtonian fluid , herschel–bulkley fluid , materials science , non newtonian fluid , elasticity (physics) , viscosity , generalized newtonian fluid , shear stress , shear flow , flow (mathematics) , planar , fluid dynamics , physics , shear rate , composite material , computer graphics (images) , computer science
A numerical simulation of entry flow in a slit die has been undertaken for a fluid that is Newtonian in shear but exhibits normal stresses (Boger fluid). Experimentally measured normal stress and viscosity data are included in a simple rheological model. Flow patterns reveal the existence of vortices in the reservoir corners. Vortex size and intensity increase rapidly with elasticity level.