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Retarding the growth of the Rosensweig instability unveils a new scaling regime

Title data

Lange, Adrian ; Gollwitzer, Christian ; Maretzki, Robin ; Rehberg, Ingo ; Richter, Reinhard:
Retarding the growth of the Rosensweig instability unveils a new scaling regime.
In: Physical Review E. Vol. 93 (2016) . - Art.Nr. 043106.
ISSN 1550-2376
DOI: https://doi.org/10.1103/PhysRevE.93.043106

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Abstract in another language

Using a highly viscous magnetic fluid, the dynamics in the aftermath of the Rosensweig instability can be slowed down by more than 2000 times. In this way we expand the regime where the growth rate is predicted to scale linearly with the bifurcation parameter by six orders of magnitude, while this regime is tiny for standard ferrofluids and cannot be resolved experimentally there. We measure the growth of the pattern by means of a two-dimensional imaging technique, and find that the slopes of the growth and decay rates are not the same—a qualitative discrepancy with respect to the theoretical predictions. We solve this discrepancy by taking into account a viscosity which is assumed to be different for the growth and decay. This may be a consequence of the measured shear thinning of the ferrofluid.

Further data

Item Type: Article in a journal
Refereed: Yes
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
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics V
Profile Fields
Profile Fields > Advanced Fields
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 12 Feb 2018 13:40
Last Modified: 24 Jan 2019 11:03
URI: https://eref.uni-bayreuth.de/id/eprint/42254