Response of viscoelastic fluids in extensional flow generated by a pulsating sphere

1983 ◽  
Vol 40 (2) ◽  
pp. 121-133 ◽  
Author(s):  
Y. L. Yeow
Keyword(s):  
Extensional Flow ◽  
Viscoelastic Fluids

Lubricated extensional flow of viscoelastic fluids in a convergent microchannel

2011 ◽  
Vol 55 (5) ◽  
pp. 1103-1126 ◽  
Author(s):  
Jing Wang ◽  
David F. James
Keyword(s):  
Extensional Flow ◽  
Viscoelastic Fluids

scholarly journals EXPERIMENTAL STUDY OF THE FLOW DYNAMICS OF COMPLEX VISCOELASTIC FLUID THROUGH HYPERBOLIC CONTRACTION/EXPANSION

2020 ◽  
pp. 76-94
Author(s):  
Muñoz Garduño Kevin David ◽  
Pérez Camacho Mariano
Keyword(s):  
Pressure Drop ◽  
Shear Flow ◽  
Extensional Flow ◽  
Viscoelastic Fluids ◽  
Excess Pressure ◽  
Flow Dynamics ◽  
Shear Type ◽  
Flow Through ◽  
Expansion System ◽  
Hyperbolic Contraction

The main objetive of this work was to experimentally study the Flow dynamics of viscoelastic fluids (Boger fluid and Hase) when they flow through a contraction/expansion system defined by a hyperbolic tube, therefore through equations analogous to the Hagen-Poiseuille equation, the pressure drop associated with the viscous interaction was quantified, and subsequently the excess pressure drop (EPD), a parameter associated with the elasticity of viscoelastic fluids, conducting comparative studies with respect to a Newtonian reference for the same shear viscosity value, which allowed observing shear speed intervals where three predominant zones were observed. The first of them of shear type coinciding with the trajectories of the Newtonian fluid of identical viscosity value, the second zone was attributed to the elastic manifestation of the fluids due to the preferential development of the extensional flow that is in constant competition with the shear flow within of the same geometry. The third zone was attributed to a predominance of the shear flow over the extensional one, because of to the fact that the hyperbolic geometry favors the development of this type of flow at high values of shear rate KEYWORDS: Excess pressure drop; Extensional flow; Hyperbolic contractions

scholarly journals Thermal Transport of Viscoelastic Fluids Within Rotating Couette Flows

2020 ◽  
Vol 34 (1) ◽  
pp. 121-133 ◽  
Author(s):  
Phillip M. Ligrani ◽  
Mengying Su ◽  
Adrian Pippert ◽  
Robert A. Handler
Keyword(s):  
Thermal Transport ◽  
Viscoelastic Fluids
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