Viscosity enhancement In non-Newtonian flow of dilute polymer solutions through crystallographic porous media

2003 ◽  
Vol 42 (6) ◽  
pp. 516-526 ◽  
Author(s):  
Simon J. Haward ◽  
Jeffrey A. Odell
Keyword(s):  
Porous Media ◽  
Polymer Solutions ◽  
Newtonian Flow ◽  
Dilute Polymer Solutions ◽  
Viscosity Enhancement

scholarly journals Driven Transport of Dilute Polymer Solutions through Porous Media Comprising Interconnected Cavities

2021 ◽  
Vol 5 (2) ◽  
pp. 22
Author(s):  
Karthik Nagarajan ◽  
Shing Bor Chen
Keyword(s):  
Molecular Weight ◽  
Porous Media ◽  
External Force ◽  
Polymer Solutions ◽  
Dissipative Particle Dynamics ◽  
Mean Velocity ◽  
Slip Boundary ◽  
Dilute Polymer Solutions ◽  
Linear Chains ◽  
Pressure Driven Flow

Driven transport of dilute polymer solutions through porous media has been simulated using a recently proposed novel dissipative particle dynamics method satisfying the no-penetration and no-slip boundary conditions. The porous media is an array of overlapping spherical cavities arranged in a simple cubic lattice. Simulations were performed for linear, ring, and star polymers with 12 arms for two cases with the external force acting on (I) both polymer and solvent beads to model a pressure-driven flow; (II) polymer beads only, similar to electrophoresis. When the external force is in the direction of a principal axis, the extent of change in the polymers’ conformation and their alignment with the driving force is more significant for case I. These effects are most pronounced for linear chains, followed by rings and stars at the same molecular weight. Moreover, the polymer mean velocity is affected by its molecular weight and architecture as well as the direction and strength of the imposed force.

Viscous fingering in non-Newtonian fluids

2002 ◽  
Vol 469 ◽  
pp. 237-256 ◽  
Author(s):  
ANKE LINDNER ◽  
DANIEL BONN ◽  
EUGENIA CORVERA POIRÉ ◽  
MARTINE BEN AMAR ◽  
JACQUES MEUNIER
Keyword(s):  
Polymer Solutions ◽  
Viscous Fingering ◽  
Taylor Instability ◽  
Newtonian Fluids ◽  
Flexible Polymers ◽  
Flow Properties ◽  
Newtonian Flow ◽  
Quantitative Investigation ◽  
Dilute Polymer Solutions ◽  
Strong Shear

We study the viscous fingering or Saffman–Taylor instability in two different dilute or semi-dilute polymer solutions. The different solutions exhibit only one non-Newtonian property, in the sense that other non-Newtonian effects can be neglected. The viscosity of solutions of stiff polymers has a strong shear rate dependence. Relative to Newtonian fluids, narrower fingers are found for rigid polymers. For solutions of flexible polymers, elastic effects such as normal stresses are dominant, whereas the shear viscosity is almost constant. Wider fingers are found in this case. We characterize the non-Newtonian flow properties of these polymer solutions completely, allowing for separate and quantitative investigation of the influence of the two most common non-Newtonian properties on the Saffman–Taylor instability. The effects of the non-Newtonian flow properties on the instability can in all cases be understood quantitatively by redefining the control parameter of the instability.

Two-Dimensional Flow of Polymer Solutions Through Porous Media

1999 ◽  
Vol 2 (3) ◽  
pp. 251-262
Author(s):  
P. Gestoso ◽  
A. J. Muller ◽  
A. E. Saez
Keyword(s):  
Porous Media ◽  
Polymer Solutions ◽  
Two Dimensional ◽  
Dimensional Flow ◽  
Two Dimensional Flow
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