Year-end Sale % OFF 
Abstract
IT is known that the addition of small amounts of certain polymers to a fluid can produce spectacular reductions in turbulent friction1,2. It is also possible to reduce friction by suspending macroscopic fibres in a fluid3. Superficially there are many similarities between the two effects but they are believed to involve different mechanisms because, for example, using polymers and fibres together can produce much larger reductions in drag than would be the case with either additive on its own4. We report here measurements of turbulent velocities in a fibre suspension, using laser–Doppler anemometry. We found that the effect of fibres on turbulent structure was not the same as that of polymers. However, when the fibre was degraded by passing it through the system several times, there was a transition to the type of structural change found in polymer solutions.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
