Entrainment reduction and additional dissipation in dilute polymer solutions

Markus Holzner, Beat Lüthi, Alexander Liberzon, Michele Guala, Wolfgang Kinzelbach

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


We present a comparative experimental study of a turbulent flow developing in clear water and dilute polymer solutions (25 and 50 wppm polyethylene oxide). The flow is forced by a planar grid that oscillates vertically in a square container of initially still fluid. The two-component velocity fields are measured in a vertical plane passing through the center of the tank by using time resolved Particle Image Velocimetry (PIV). We obtain a lower entrainment rate for polymer solutions as compared to clear water. Extending arguments based on similarity and fractal theory to the case of dilute polymer solutions, we derive a relation between the entrainment rate and the fraction of input energy dissipated by the polymers.

Original languageEnglish
Title of host publicationProgress in Turbulence III - Proceedings of the iTi Conference in Turbulence 2008
EditorsMartin Oberlack, Joachim Peinke, Alessandro Talamelli
PublisherSpringer Science and Business Media, LLC
Number of pages4
ISBN (Print)9783642022241
StatePublished - 2010
Event3rd Conference on Turbulence, iTi 2008 - Bertinoro, Italy
Duration: 1 Jan 20081 Jan 2008

Publication series

NameSpringer Proceedings in Physics
ISSN (Print)0930-8989
ISSN (Electronic)1867-4941


Conference3rd Conference on Turbulence, iTi 2008


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