Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/59763
Title: Growth rates of viscoelastic vortex rings
Author: Clopés Llahí, Judit
Director: Ortín, Jordi, 1959-
Keywords: Viscoelasticitat
Vòrtexs
Tesis
Viscoelasticity
Vortex-motion
Theses
Issue Date: Jun-2014
Abstract: In this research, experimental studies were performed to investigate the mechanisms of vortex ring formation in a viscoelastic solution of CPyCl/NaSal [100:60] mM in distilled water. We used 2-dimensional particle image velocimetry (PIV) to characterize the transition from laminar to unstable regimes in a cylindrical oscillatory pipe ow, for a constant frequency of 5 Hz. Mea- surements reveal that the activation time of the vortex rings shows a dramatic dependence with the forcing amplitude, in contrast with the development time of the vortex rings, which seems to be independent of the forcing amplitude and remains constant with a value of 1.9 0.5 s.
Note: Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Any: 2014, Tutor: Jordi Ortín
URI: http://hdl.handle.net/2445/59763
Appears in Collections:Treballs Finals de Grau (TFG) - Física

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