Skip to Main content Skip to Navigation
Journal articles

A damping phenomenon in viscoelastic fluids

Abstract : Flow fields behind a sphere settling in polymeric fluids are investigated using a Particle Image Velocimetry (PIV) technique. Complex features including both a negative wake and a surrounding cone are quantified. In particular, an oscillation zone, which takes place behind the negative wake, is identified for the first time. A physical understanding of various phenomena involved in the wake is gained. The damping phenomenon can be attributed to the viscoelastic properties and the surrounding cone stems from a propagation front of lateral viscoelastic wave emitted by the settling sphere. The oscillation frequency and open angle of the surrounding cone are theoretically related to a viscoelastic Mach number. Satisfactory agreement with experiments is observed.
Complete list of metadatas

https://hal.archives-ouvertes.fr/hal-01268559
Contributor : Archive Ouverte Prodinra <>
Submitted on : Thursday, February 4, 2016 - 11:18:17 PM
Last modification on : Wednesday, May 27, 2020 - 12:28:14 PM

Licence


Copyright

Links full text

Identifiers

Citation

Xavier Frank, N. Dietrich, Huai-Zhi Li. A damping phenomenon in viscoelastic fluids. EPL - Europhysics Letters, European Physical Society/EDP Sciences/Società Italiana di Fisica/IOP Publishing, 2014, 105 (5), 6 p. ⟨10.1209/0295-5075/105/54006⟩. ⟨hal-01268559⟩

Share

Metrics

Record views

226