Observation expérimentale de doublement de fréquence dans la couche de mélange viscoélastique.

Translated title of the contribution: Experimental observation of frequency doubling in a viscoelastic mixing layer

F. Sausset, O. Cadot, S. Kumar

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

An experimental mixing layer in water at Reynolds number 440 is investigated. A colored viscoelastic solution is introduced in the shear layer before the roll-up dynamics. On the basis of flow visualization and local velocity measurements, it is found that compared to the Newtonian case, the roll-up process is affected by the non-Newtonian behavior of the viscoelastic solution. The effect consists of the appearance of secondary eddies in the mixing layer corresponding to the production of higher harmonics in the vorticity distribution. Consequently, there is a frequency doubling of the local velocity oscillations in the mixing layer.

Translated title of the contributionExperimental observation of frequency doubling in a viscoelastic mixing layer
Original languageFrench
Pages (from-to)1001-1006
Number of pages6
JournalComptes Rendus - Mecanique
Volume332
Issue number12
DOIs
StatePublished - Dec 1 2004

Keywords

  • Elasticity
  • Fluid mechanics
  • Harmonic production
  • Mixing layer

Fingerprint Dive into the research topics of 'Experimental observation of frequency doubling in a viscoelastic mixing layer'. Together they form a unique fingerprint.

Cite this