Heterogeneous drag reduction in turbulent pipe flows using various injection techniques

1988 ◽  
Vol 27 (1) ◽  
pp. 92-110 ◽  
Author(s):  
B. Frings
Keyword(s):  
Drag Reduction ◽  
Pipe Flows ◽  
Injection Techniques ◽  
Heterogeneous Drag Reduction

Heterogeneous Drag Reduction Concepts and Consequences

1998 ◽  
Vol 120 (4) ◽  
pp. 818-823 ◽  
Author(s):  
Klaus W. Hoyer ◽  
Albert Gyr
Keyword(s):  
Flow Field ◽  
Turbulent Flow ◽  
Drag Reduction ◽  
Polymer Solution ◽  
Large Scale ◽  
Scale Interaction ◽  
Polymer Molecules ◽  
Pipe Flows ◽  
Heterogeneous Drag Reduction ◽  
Turbulent Flow Field

This paper deals with the nature of the heterogeneous drag reduction which occurs in turbulent pipe flows when a concentrated polymer solution is injected into the pipe center. According to earlier concepts, the achieved drag reduction is due to a direct, large-scale interaction of the viscoelastic polymer thread with the turbulent flow field. The authors prove that the heterogeneous drag reduction originates exclusively from agglomerates of dissolved polymer molecules present in the flow.

Improvement of drag reduction prediction in viscoelastic pipe flows using proper low-Reynoldsk-εturbulence models

2019 ◽  
Vol 516 ◽  
pp. 412-422 ◽  
Author(s):  
Ehsan Rasti ◽  
Farhad Talebi ◽  
Kiumars Mazaheri
Keyword(s):  
Drag Reduction ◽  
Pipe Flows

On the link between experimentally‐measured turbulence quantities and polymer‐induced drag reduction in pipe flows

AIChE Journal ◽  
2019 ◽  
Vol 65 (9) ◽  
Author(s):  
Victor Voulgaropoulos ◽  
Ivan Zadrazil ◽  
Niccolò Le Brun ◽  
Alexander Bismarck ◽  
Christos N. Markides
Keyword(s):  
Drag Reduction ◽  
Pipe Flows ◽  
Induced Drag

DRAG REDUCTION IN TURBULENT PIPE FLOWS WITH POLYMER-POLYMER MIXTURES

2015 ◽  
Author(s):  
Gustavo Alonso Barrientos Sandoval ◽  
Edson José Soares ◽  
Fabricio Thomaz
Keyword(s):  
Drag Reduction ◽  
Polymer Mixtures ◽  
Pipe Flows

An experimental study of the drag reduction pipe flows with the addition of natural macromolecules

2019 ◽  
Vol 2019 (0) ◽  
pp. OS10-13
Author(s):  
Shinichirou YANASE ◽  
Eisuke YAMANE ◽  
Toshinori KOUCHI ◽  
Yasunori NAGATA ◽  
Kazunori YASUDA
Keyword(s):  
Experimental Study ◽  
Drag Reduction ◽  
Pipe Flows

A combined PIV/LIF-system for the measurement of heterogeneous drag reduction effects in a pipe-flow

1997 ◽  
Vol 22 (4) ◽  
pp. 292-299 ◽  
Author(s):  
M. Saadeh ◽  
K. Strauss ◽  
T. Schneider
Keyword(s):  
Drag Reduction ◽  
Pipe Flow ◽  
Heterogeneous Drag Reduction

DRAG REDUCTION BY A MIXTURE OF POLYMERS AND FIBERS EXTRACTED FROM OKRA PODS IN TURBULENT PIPE FLOWS

2016 ◽  
Author(s):  
Eduardo Coelho ◽  
Kelvin Barbosa ◽  
Edson Soares ◽  
Renato Siqueira
Keyword(s):  
Drag Reduction ◽  
Pipe Flows

Evidence for molecular interactions in drag reduction in turbulent pipe flows

1980 ◽  
Vol 20 (7) ◽  
pp. 451-455 ◽  
Author(s):  
Neil S. Berman
Keyword(s):  
Drag Reduction ◽  
Molecular Interactions ◽  
Pipe Flows

An investigation of possible mechanisms of heterogeneous drag reduction in pipe and channel flows

1993 ◽  
Vol 32 (2) ◽  
pp. 140-149 ◽  
Author(s):  
H. W. Bewersdorff ◽  
A. Gyr ◽  
K. Hoyer ◽  
A. Tsinober
Keyword(s):  
Drag Reduction ◽  
Channel Flows ◽  
Heterogeneous Drag Reduction
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