Volume 74, Number 2, April 2006
|Page(s)||362 - 368|
|Section||Interdisciplinary physics and related areas of science and technology|
|Published online||10 March 2006|
Turbulent drag reduction by surfactants
Ecole Normale Supérieure, Laboratoire de Physique Statistique 24 rue Lhomond, 75231 Paris Cedex 05, France
2 Centre de Physique Moléculaire Optique et Hertzienne 351 cours de la Libération, 33405 Talence, France
3 LMSGC, ENPC - 6-8 avenue Blaise Pascal 77455 Marne-la-Vallée Cedex 2, France
4 Université du Havre, Laboratoire de mécanique 25 rue Philippe Lebon, 76600 Le Havre, France
5 van der Waals-Zeeman Institute - Valckenierstraat 65 1018 XE Amsterdam, the Netherlands
Corresponding author: firstname.lastname@example.org.
Accepted: 14 February 2006
Drag reduction of turbulent flows by surfactant additives is studied. The surfactant forms a shear-induced gel phase in both rheological and turbulent flows. In both flows, the fracture of the gel causes an apparent wall slip. The slipping in turbulent flows decreases the wall friction and therefore immediately leads to drag reduction, providing a detailed mechanism for drag reduction by surfactants.
PACS: 83.60.Yz – Drag reduction / 82.70.Uv – Surfactants, micellar solutions, vesicles, lamellae, amphiphilic systems (hydrophilic and hydrophobic interactions) / 83.50.Rp – Wall slip and apparent slip
© EDP Sciences, 2006
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