2006/07/06 by Yacine Amarouchène, Amarouchene, Yacine, Daniel Bonn +9
Chemical Engineering · Engineering · #Chaotic Dynamics (nlin.CD) #FOS: Physical sciences #Fluid Dynamics (physics.flu-dyn) #Fluid Dynamics and Turbulent Flows #Rheology and Fluid Dynamics Studies
paper · doi:10.48550/arxiv.nlin/0607006
openalex publication_date 2006/07/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present experimental and theoretical results addressing the Reynolds number (Re) dependence of drag reduction by sufficiently large concentrations of rod-like polymers in turbulent wall-bounded flows. It is shown that when Re is small the drag is \em enhanced. On the other hand when Re increases the drag is reduced and eventually the Maximal Drag Reduction (MDR) asymptote is attained. The theory is shown to be in excellent agreement with experiments, rationalizing and explaining all the universal and the non-universal aspects of drag reduction by rod-like polymers.