Chapter 13. Turbulent Drag-reduction Applications of Surfactant Solutions

2017 ◽  
pp. 353-378 ◽  
Author(s):  
Jacques L. Zakin ◽  
Andrew J. Maxson ◽  
Takashi Saeki ◽  
Phillip F. Sullivan
Keyword(s):  
Drag Reduction ◽  
Turbulent Drag Reduction ◽  
Surfactant Solutions ◽  
Turbulent Drag

Turbulent drag reduction in nonionic surfactant solutions

2010 ◽  
Vol 22 (5) ◽  
pp. 055102 ◽  
Author(s):  
Shinji Tamano ◽  
Motoyuki Itoh ◽  
Katsuo Kato ◽  
Kazuhiko Yokota
Keyword(s):  
Drag Reduction ◽  
Nonionic Surfactant ◽  
Turbulent Drag Reduction ◽  
Surfactant Solutions ◽  
Turbulent Drag

Drag Reduction in a Small-Scale Circulation System of Surfactant Solutions

2007 ◽  
Author(s):  
Shinzo Tominaga ◽  
Hiroshi Mizunuma
Keyword(s):  
Drag Reduction ◽  
Ion Concentration ◽  
Small Scale ◽  
Circulation System ◽  
Pipeline System ◽  
Turbulent Drag Reduction ◽  
Surfactant Solutions ◽  
Counter Ion ◽  
Turbulent Drag ◽  
Wide Range

Turbulent drag reduction due to surfactant solutions was investigated for a small-scale pipeline system composed complex elements. The effects of the counter-ion concentration were discussed on the drag reduction, the viscoelastic characteristics, and the vortex inhibition. When the molar concentration of the counter-ion was ten times higher than that of the surfactant, the drag reduction appeared over the wide range of the surfactant concentration. This combination of counter-ion and surfactant exhibited a modest increase in viscosity, and the vortex inhibition appeared at a high stretching rate.

scholarly journals Fibre-induced drag reduction

2008 ◽  
Vol 602 ◽  
pp. 209-218 ◽  
Author(s):  
J. J. J. GILLISSEN ◽  
B. J. BOERSMA ◽  
P. H. MORTENSEN ◽  
H. I. ANDERSSON
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Reynolds Number ◽  
Drag Reduction ◽  
Elastic Layer ◽  
Turbulent Drag Reduction ◽  
Rigid Polymer ◽  
Fibre Concentration ◽  
Induced Drag ◽  
Turbulent Drag

We use direct numerical simulation to study turbulent drag reduction by rigid polymer additives, referred to as fibres. The simulations agree with experimental data from the literature in terms of friction factor dependence on Reynolds number and fibre concentration. An expression for drag reduction is derived by adopting the concept of the elastic layer.

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