Influence of drag reducing additives on the structure of turbulence in a mixing layer
β Scribed by M. Hibberd; M. Kwade; R. Scharf
- Publisher
- Springer-Verlag
- Year
- 1982
- Tongue
- English
- Weight
- 433 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0035-4511
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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
The effect of polymer concentration on drag reduction was studied experimentally with diluted water solutions of polyvinylacetate in a 2.4 cm I.D. pipe. The instantaneous local velocities of the velocity fields were measured by a one-channel differential laser-Doppler anemometer DISA Mark II, with f