Journal ArticleDOI
Effect of Shear Degradation on the Rheological Properties of Dilute Drag‐Reducing Polymer Solutions
Hsun‐Fu David Chang,Ron Darby +1 more
Reads0
Chats0
TLDR
In this article, a nonlinear integral constitutive equation is proposed which accurately represents these data, and the effects of concentration and shear degradation on the properties (e.g., the model parameters) is shown.Abstract:
Apparent viscosity over a range of 106 s−1 in shear rate and first normal stress difference functions for dilute drag‐reducing solutions of Separan AP‐30 in distilled water were measured for both freshly prepared and shear‐degraded solutions, for concentrations from 100 to 500 wppm. A nonlinear integral constitutive equation is proposed which accurately represents these data, and the effects of concentration and shear degradation on the properties (e.g., the model parameters) is shown. Shearing has a greater effect on the low shear viscosity of these solutions than it has on the elastic properties, resulting in a greater degree of drag reduction for the sheared than the fresh solutions.read more
Citations
More filters
Journal ArticleDOI
A review on drag reduction with special reference to micellar systems
TL;DR: In this article, a review on drag reduction has been presented in order to bring out some important aspects of the drag reduction phenomenon and its potential for practical use, which is biased towards micellar systems.
Journal ArticleDOI
Rheological properties of aqueous polyacrylamide/NaCl solutions
TL;DR: In this article, a comprehensive study of the rheological properties of polyacrylamide solutions was carried out using a RheoStress RS100 Haake rheometer.
Journal ArticleDOI
Degradation effects of dilute polymer solutions on turbulent friction and heat transfer behavior
TL;DR: In this paper, the degradation run for dilute polymers was conducted for 730 h, which is considerably longer than any of the earlier degradation studies reported in the literature, and it was found that dilute Polyox solution cannot be used in recirculatory systems because it degraded completely in less than 24 h.
Journal ArticleDOI
Flow behavior of enhanced oil recovery Alcoflood polymers
Mamdouh T. Ghannam,Nabil Esmail +1 more
TL;DR: In this paper, the authors investigated flow behavior in terms of shear stress and viscosity versus shear rate for aqueous solutions of Alcoflood polymer materials, using Rheostress RS100 for operating, measuring, and analyzing this experimental investigation.
Journal ArticleDOI
The effects of viscoelastic fluid on the cavitation inception and development within a centrifugal pump: An experimental study
TL;DR: In this article, the cavitation in a transparent centrifugal pump has been experimentally investigated using viscoelastic fluid, and the results illustrated that the polymer concentration, cavitation number, and degradation can dramatically affect the bubble initiation and development.