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Measuring the Kelvin-Helmholtz instability, stabilized by a tangential magnetic field

Title data

Völkel, Alexandra ; Kögel, Armin ; Richter, Reinhard:
Measuring the Kelvin-Helmholtz instability, stabilized by a tangential magnetic field.
In: Journal of Magnetism and Magnetic Materials. (5 March 2020) . - No. 166693.
ISSN 0304-8853
DOI: https://doi.org/10.1016/j.jmmm.2020.166693

Official URL: Volltext

Abstract in another language

In a flow channel we experimentally investigate the stability of the interface between a laminar flow of diamagnetic fluid, superimposed by a resting layer of ferrofluid. This interface is locally perturbed by means of a bar oscillating with a driving frequency. Measuring the growth rate of the interfacial waves, we explore the stabilizing effect of a homogeneous magnetic field oriented in flow direction. A zero growth rate determines the critical flow velocity. The latter increases with the applied magnetic field and depends sensitively on the driving frequency. The results are described in part by an established, simple inviscid model.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Kelvin-Helmholtz instability; Ferrofluid; Tangential magnetic field; Reynolds number 3000 - 6000; Critical velocity; Magnetic stabilization
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics V > Chair Experimental Physics V - Univ.-Prof. Dr. Ingo Rehberg
Profile Fields > Advanced Fields > Nonlinear Dynamics
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 10 Mar 2020 10:32
Last Modified: 10 Mar 2020 10:32
URI: https://eref.uni-bayreuth.de/id/eprint/54595