The flow of a dilute cationic surfactant solution past a circular cylinder

Citation
C. Bergins et al., The flow of a dilute cationic surfactant solution past a circular cylinder, EXP FLUID, 30(4), 2001, pp. 410-417
Citations number
30
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Mechanical Engineering
Journal title
EXPERIMENTS IN FLUIDS
ISSN journal
0723-4864 → ACNP
Volume
30
Issue
4
Year of publication
2001
Pages
410 - 417
Database
ISI
SICI code
0723-4864(200104)30:4<410:TFOADC>2.0.ZU;2-#
Abstract
The influence of a dilute solution of the cationic surfactant C(14)Sal on t he flow past a cylinder was investigated by means of LDV and Toepler Schlie ren optics for visualization of both the flow and structure of the fluid. A t low Reynolds numbers the flow is similar to the Newtonian Karman vortex s treet. The periodic vortex shedding disappears simultaneously with the occu rrence of a shear-induced structure. The alteration of the turbulence chara cteristics is especially pronounced in the turbulent velocity fluctuations with the u(rms) being many times over the values in water, whereas the v(rm s) are drastically reduced.