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Article Dans Une Revue Journal of Non-Newtonian Fluid Mechanics Année : 2014

Drag increase at the very start of drag reducing flows in a rotating cylindrical double gap device

Rafhael M. Andrade
  • Fonction : Auteur
Edson J. Soares
  • Fonction : Auteur

Résumé

In this note we present some results concerning the time required for turbulent structures to achieve their steady state, called here the developing time. Notably, there is a drag increase at the very start of the test. Such a drag increase is strongly dependent on the concentration, molecular weight, temperature, Reynolds number, and molecule conformation before the test start-up. The analysis conducted here improves the understanding of the way drag reduction evolves over time, which was considered in Pereira et al. (2013).
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Dates et versions

hal-01074678 , version 1 (15-10-2014)

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Rafhael M. Andrade, Anselmo S. Pereira, Edson J. Soares. Drag increase at the very start of drag reducing flows in a rotating cylindrical double gap device. Journal of Non-Newtonian Fluid Mechanics, 2014, 212, pp.73-79. ⟨10.1016/j.jnnfm.2014.08.010⟩. ⟨hal-01074678⟩

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