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Influence of slip on the flow of a yield stress fluid around a flat plate
Author(s) -
Ahonguio Fiacre,
Jossic Laurent,
Magnin Albert
Publication year - 2016
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.15116
Subject(s) - mechanics , slip (aerodynamics) , slip ratio , drag , particle image velocimetry , materials science , tribology , shear stress , slip line field , velocimetry , viscoplasticity , flow velocity , fluid dynamics , kinematics , fictitious force , shear velocity , flow (mathematics) , shear (geology) , classical mechanics , composite material , turbulence , physics , thermodynamics , constitutive equation , finite element method
This experimental study deals with the influence of slip on the non‐inertial flow of a viscoplastic fluid around a flat plate moving at a constant velocity. The bulk and interfacial properties of the fluid have been finely characterized. The drag force has been analyzed with regards to the flow velocity and for two tribological conditions: adherence and slip. This force decreases with the velocity and is reduced in the presence of slip. Kinematic fields have also been measured by Particle Image Velocimetry (PIV), to determine the influence of both the velocity and the tribological conditions on the liquid and solid regions of the flow. The results highlight no significant influence of the flow velocity on the thickness of the boundary layer and rigid zones. The wall shear stresses along the plate obtained from force measurements and slip velocities are then compared to rheometrical measurements. © 2015 American Institute of Chemical Engineers AIChE J , 62: 1356–1363, 2016