Entangled Linear Polymer Solutions at High Shear: From Strain Softening to Hardening

2016 ◽  
Vol 49 (24) ◽  
pp. 9647-9654 ◽  
Author(s):  
Gengxin Liu ◽  
Shi-Qing Wang
Keyword(s):  
Strain Softening ◽  
Polymer Solutions ◽  
Linear Polymer ◽  
High Shear

Degradation of homogeneous polymer solutions in high shear turbulent pipe flow

2009 ◽  
Vol 47 (6) ◽  
pp. 1033-1044 ◽  
Author(s):  
B. R. Elbing ◽  
E. S. Winkel ◽  
M. J. Solomon ◽  
S. L. Ceccio
Keyword(s):  
Pipe Flow ◽  
Polymer Solutions ◽  
Turbulent Pipe Flow ◽  
High Shear

Thermodynamic and Hydrodynamic Properties of Linear Polymer Solutions. II. Limiting Viscosity Number of Monodisperse Poly(α-methylstyrene)

1970 ◽  
Vol 3 (6) ◽  
pp. 787-794 ◽  
Author(s):  
I. Noda ◽  
K. Mizutani ◽  
T. Kato ◽  
T. Fujimoto ◽  
M. Nagasawa
Keyword(s):  
Polymer Solutions ◽  
Linear Polymer ◽  
Hydrodynamic Properties

Thermodynamic and Hydrodynamic Porperties of Linear Polymer Solutions. I. Light Scattering of Monodisperse Poly(α-methylstyrene)

1970 ◽  
Vol 3 (6) ◽  
pp. 777-786 ◽  
Author(s):  
T. Kato ◽  
K. Miyaso ◽  
I. Noda ◽  
T. Fujimoto ◽  
M. Nagasawa
Keyword(s):  
Light Scattering ◽  
Polymer Solutions ◽  
Linear Polymer

Stress relaxation in linear polymer solutions after stepwise decrease of shear rate

1987 ◽  
Vol 20 (1) ◽  
pp. 153-156 ◽  
Author(s):  
Yoshiaki Takahashi ◽  
Yoshinobu Isono ◽  
Ichiro Noda ◽  
Mitsuru Nagasawa
Keyword(s):  
Shear Rate ◽  
Stress Relaxation ◽  
Polymer Solutions ◽  
Linear Polymer

Nonnewtonian Flow of Poly(Dimethyl Siloxane)

1967 ◽  
Vol 40 (5) ◽  
pp. 1483-1491
Author(s):  
Yoshio Ito
Keyword(s):  
Shear Rate ◽  
Polymer Solutions ◽  
Flow Behavior ◽  
Degree Of Polymerization ◽  
High Shear ◽  
Newtonian Viscosity ◽  
Shear Rates ◽  
Molecular Weights ◽  
Dimethyl Siloxane ◽  
Wide Range

Abstract Nonnewtonian flow of poly(dimethyl siloxanes) of various molecular weights has been studied with a short capillary viscosimeter. The experiment covered a wide range of shear rate, from 10−1 to 3×106sec−1. Results were as follows: (1) Flow behavior of the sample changes with the degree of polymerization. For siloxanes with degrees of polymerization less than 1.55×102, flow of the fluid is newtonian throughout the whole range of shear rates; for siloxanes with degrees of polymerization from 3.22×102 to 2.63×103, flow is nonnewtonian at moderate shear rates; it again becomes newtonian at high shear rates. With degrees of polymerization more than 3.31×103, the spiral flow rises to a high shear rate. (2) Plow behavior of the samples is expressed by modifying Shishido's equation proposed for nonnewtonian polymer solutions. (3) When the observed flow curve contains its inflection point, the upper newtonian viscosity can be estimated by a new method proposed here. (4) The relations among the end correction of capillary, the pressure loss, and the shear stress proposed by Shishido for polymer solutions are applicable to poly(dimethy! siloxane) also.

Mobility Control With Polymer Solutions

1967 ◽  
Vol 7 (02) ◽  
pp. 161-173 ◽  
Author(s):  
W.B. Gogarty
Keyword(s):  
Polymer Solution ◽  
Polymer Solutions ◽  
Control Mechanism ◽  
The United States ◽  
Mobility Control ◽  
High Shear ◽  
Polymer Flow ◽  
Shear Rates ◽  
High Shear Rates ◽  
Secondary Recovery

Abstract With the use of polymer solutions in secondary recovery operations, the need has developed to understand the mobility control mechanism. This study investigated mobility control by considering both permeability and rheological effects. Experiments used a high molecular weight, partially hydrolyzed polyacrylamide polymer. Flow studies took place in reservoir and Berea cores having zero oil saturation. Effective size of the polymer flow unit was inferred from Nuclepore filter tests. Clay studies indicated the particle size capable of decreasing the core permeability. Flushed permeabilities measured the approximate core permeabilities with flowing polymer solutions. These permeabilities were considerably lower than original values. With mobility data and the flushed permeability, maximum effective viscosities were determined for polymer solution flow in a core. Effective viscosities showed that rheological properties play an important part in mobility control with polymer solutions. The study showed that permeabilities decrease and stabilize with polymer flow. At the lower permeabilities, high shear rates exist in the cores. Because of the pseudoplastic character of the polymer solution, the high shear rates caused low effective viscosities. This condition pointed to the inefficient use of the potentially high viscosity of the polymer solution at low shear rates. Introduction In the oil industry, a great deal of interest is being shown in the use of polymer solutions for secondary recovery and a number of polymer floods are being performed in the United States. Some of these floods have become commercial while others have been reported as failures. A number of floods are still in progress and remain to be evaluated. With the advent of polymer flooding, the need developed to understand the mobility control mechanism in porous media.

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