Self-similar drag reduction in plug-flow of suspensions of macroscopic fibers

JJJ Gillissen, JP Hoving

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

Abstract

Physics of Fluids / Volume 24 / Issue 11 / LETTERS / 111702 (2012); (6 pages) Pipe flow experiments show that turbulent drag reduction in plug-flow of concentrated suspensions of macroscopic fibers is a self-similar function of the wall shear stress over the fiber network yield stress. We model the experimental observations, by assuming a central fiber network plug, whose radius is determined by the yield stress. According to the model the plug constrains the size of the turbulent eddies in the surrounding annulus, with the effect of a reduced friction factor as compared to Newtonian flow.
Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalPhysics of Fluids
Volume24
Issue number11
DOIs
Publication statusPublished - 2012

Keywords

  • CWTS 0.75 <= JFIS < 2.00

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