The normal field instability in ferrofluids
Summary
Static liquid mountains emerge on the free surface of a magnetic fluid (see logo) when a critical value of a vertical magnetic field is surpassed. Forty years after its inital observation and analysis by M. D. Cowley and R. E. Rosensweig (Journal of Fluid Mechanics 1967), this pattern forming instability is attracting renewed interest. This is partly due to modern measurement techniques as well as improved analytical and numerical approaches which have lead to the discovery of new surface configurations. A further impetus comes from previously uncommon or even new magnetic materials like liquid oxygen or ferrogels. This session reviews recent developments in the area and complements the minisymposium on pattern formation in conservative systems.
Organiser: Reinhard Richter, Ferrofluid Group, Universität Bayreuth, Germany
Speakers
Nonlinear description of the Rosensweig instability in ferrogels
Stefan Bohlius
Max Planck Institute for Polymer Research, Mainz, Germany
Imperfections-induced pattern multiplicities in the Rosensweig instability
Andreas Boudouvis
National Technical University of Athens, Greece
Measuring the anomalous dispersion branch of surface waves on ferrofluids
Jan Peter Embs
ETH Zürich and Paul Scherrer Institut, Switzerland
Quantification of the surface topography in complex magneto-elastic materials
Christian Gollwitzer
Universität Bayreuth, Germany
Dynamic crystalline corrugations on the surface of magnetised liquid oxygen
Richard Hill
University of Nottingham, UK
Revealing the linear aspects of the Rosensweig instability by means of growing and decaying ridges
Adrian Lange
Fraunhofer Institute for Material and Beam Technology, Dresden, Germany
The normal field instability - recollections and ramifications
Ronald Rosensweig
Scientific Advisor (retired), Exxon Corporate Research, USA
Numerical study of soliton-like surface configurations on a magnetic fluid layer in the Rosensweig instability
Lutz Tobiska
Otto von Guericke Universität Magdeburg, Germany
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