Turbulent drag reduction in dam-break flows
✍ Scribed by Imre M. Jánosi; Dominique Jan; K. Gábor Szabó; Tamás Tél
- Publisher
- Springer
- Year
- 2004
- Tongue
- English
- Weight
- 602 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0723-4864
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📜 SIMILAR VOLUMES
A novel eddy viscosity model for predicting friction drag reduction induced by polymers in turbulent wall-bounded flows is presented. The approach is based on the elliptic relaxation model modified to account for the modified Reynolds-stress equilibrium established by the presence of elastic polymer
Secondary flows are always present when a turbulent Newtonian fluid flows through a square duct. We show that they are suppressed in surfactant solutions at maximum drag reduction. This result confirms the one-dimensional behaviour of such flows, which is caused by the alignment of the micelles.
## Abstract Structural turbulence has been detected in dilute aqueous solutions of Polyox Coagulant (also known to be a highly effective drag‐reducing agent). The flow line which characterizes structural turbulence from its onset in the laminar region passes well into the fully turbulent region (Re