Turbulent structure of flows with friction-reducing additives
β Scribed by A. B. Stupin; P. V. Aslanov
- Publisher
- Springer US
- Year
- 1981
- Tongue
- English
- Weight
- 381 KB
- Volume
- 41
- Category
- Article
- ISSN
- 1573-871X
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The turbulent frictional drag of water can be reduced dramatically by adding small amounts of drag-reducing materials, such as polymers or surfactants. As a percentage drag reduction of 80% can easily be achieved, this technique is thought to be the most practical method of reducing turbulent fricti
Randomly-forced fluid flow in the presence of scale-unselective dissipation develops mean currents following topographic contours. Known mechanisms based on the scale-selective action of damping processes are not at work in this situation. Coarse-graining reveals that the phenomenon is a kind of noi