Drag Reduction in Polymer Solutions

1995 ◽  
pp. 101-155
Author(s):  
A. Gyr ◽  
H.-W. Bewersdorff
Keyword(s):  
Drag Reduction ◽  
Polymer Solutions

On the mechanism of drag reduction in dilute polymer solutions

1996 ◽  
Vol 55 (4) ◽  
pp. 289-295 ◽  
Author(s):  
K. Hoyer ◽  
A. Gyr ◽  
A. Tsinober
Keyword(s):  
Drag Reduction ◽  
Polymer Solutions ◽  
Dilute Polymer Solutions

Drag Reduction of Polymer Solutions in a Pipe With a Highly Water-Repellent Wall

1999 ◽  
Author(s):  
Keizo Watanabe ◽  
Hiroshi Udagawa
Keyword(s):  
Pressure Drop ◽  
Laminar Flow ◽  
Drag Reduction ◽  
Polymer Solutions ◽  
Tap Water ◽  
Acrylic Resin ◽  
Water Repellent ◽  
Number Range ◽  
Surfactant Solutions ◽  
Laminar And Turbulent Flow

Abstract By applying a highly water-repellent wall pipe in the drag reduction of polymer solutions, a flow system in which drag reduction is obtained in both laminar and turbulent flow ranges has been realized. Experiments were carried out to measure the pressure drop in pipes with a highly water-repellent wall and an acrylic resin wall by means of a pressure transducer. The diameter of the pipe was 6mm. The polymer solutions tested were PE015 aqueous solutions in the concentration range of 30ppm∼1000ppm. The drag reduction ratio for laminar flow was about 11∼15%. To understand this effect, the pressure drop was measured by using surfactant solutions and degassed water, and by pressurizing tap water in the pipeline. It was shown that the laminar drag reduction does not occur in the case of surfactant solutions although degassed water and pressurizing tap water in the pipeline have no effect on the reduction. In the laminar flow range, the friction factor of a power-law fluid with fluid slip was analyzed by applying the modified boundary condition on fluid slip at the pipe wall, and the analytical results agree with the experimental results in the low Reynolds number range.

scholarly journals Comparative assessment of drag reduction efficiencies of polymer solutions and surfactants at low temperatures

2019 ◽  
Vol 696 ◽  
pp. 012004 ◽  
Author(s):  
E S Kashlach ◽  
E M Berezina ◽  
A S Smirnova ◽  
I A Berezina ◽  
V N Manzhai ◽  
...  
Keyword(s):  
Drag Reduction ◽  
Low Temperatures ◽  
Polymer Solutions ◽  
Comparative Assessment

0411 Drag Reduction of Bio-polymer Solutions and Its Application

2012 ◽  
Vol 2012.49 (0) ◽  
pp. 041101-041102
Author(s):  
Keizo WATANABE ◽  
Hiroshi TOCHIGI ◽  
Satoshi OGATA ◽  
Daigo NAKAMURA
Keyword(s):  
Drag Reduction ◽  
Polymer Solutions
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