Effects of Polymer Addition on Friction in a 10-in.-Diam Pipe

Forester, R. H.; Larson, R. E.; Hayden, J.W.; Wetzel, Joseph M.

doi:10.2514/3.62805

Cited by 12 publications

(3 citation statements)

References 5 publications

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“…Forester et al [110] analyzed the effect of a polymeric additive on DR in a pipe flow (where the pipe diameter was 254 mm), and suggested the potential application of drag reduction to sewer systems. Experimental evidence suggested that the discharge capacities of sewers can be Recently, Ueberschar et al [101] compared the fluid friction of single micrometer-sized blank and DNA-grafted PS microspheres under shear flow, and found that a thick DNA brush layer grafted onto PS microspheres reduced the frictional drag significantly, especially in dilute λ-DNA solution.…”

Section: Applications Of Polymer-induced Drag Reductionmentioning

confidence: 99%

Section: Applications Of Polymer-induced Drag Reductionmentioning

confidence: 99%

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Applications of Water-Soluble Polymers in Turbulent Drag Reduction

2017

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Water-soluble polymers with high molecular weights are known to decrease the frictional drag in turbulent flow very effectively at concentrations of tens or hundreds of ppm. This drag reduction efficiency of water-soluble polymers is well known to be closely associated with the flow conditions and rheological, physical, and/or chemical characteristics of the polymers added. Among the many promising polymers introduced in the past several decades, this review focuses on recent progress in the drag reduction capability of various water-soluble macromolecules in turbulent flow including both synthetic and natural polymers such as poly(ethylene oxide), poly(acrylic acid), polyacrylamide, poly(N-vinyl formamide), gums, and DNA. The polymeric species, experimental parameters, and numerical analysis of these water-soluble polymers in turbulent drag reduction are highlighted, along with several existing and potential applications. The proposed drag reduction mechanisms are also discussed based on recent experimental and numerical researches. This article will be helpful to the readers to understand better the complex behaviors of a turbulent flow with various water-soluble polymeric additives regarding experimental conditions, drag reduction mechanisms, and related applications.

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Section: Applications Of Polymer-induced Drag Reductionmentioning

confidence: 99%

Section: Applications Of Polymer-induced Drag Reductionmentioning

confidence: 99%

Applications of Water-Soluble Polymers in Turbulent Drag Reduction

2017

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show abstract

“…La figure 13, d'après la référence [29], montre que pour une conduite de 254 mm, la réduction de frottement maximale n'est que de 38 %, bien infé-rieure à celle observée dans des tubes de très petit diamètre (figure 1). D'autre part, aucune réduction de frottement n'apparait avant d'avoir atteint des nombres de Reynolds de l'ordre de 60 000, bien supérieurs aux seuils mis en évidence dans les petits diamètres.…”

Section: Polyox Wsr 301unclassified