124 citations · 805 across the 41 of their papers we have counts for
10 papers · 1 filter
Retarding the growth of the {Rosensweig} instability unveils a new scaling regime
Adrian Lange, Christian Gollwitzer, Robin Maretzki +2
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 wher…
Homoclinic snaking near the surface instability of a polarizable fluid
David J. B. Lloyd, Christian Gollwitzer, Ingo Rehberg +1
We report on localized patches of cellular hexagons observed on the surface of a magnetic fluid in a vertical magnetic field. These patches are spontaneously generated by jumping i…
From Phase Space Representation to Amplitude Equations in a Pattern Forming Experiment
Christian Gollwitzer, Ingo Rehberg, Reinhard Richter
We describe and demonstrate a method to reconstruct an amplitude equation from the nonlinear relaxation dynamics in the succession of the Rosensweig instability. A flat layer of a…
Particle dynamics of a cartoon dune
Christopher Groh, Ingo Rehberg, Christof A. Kruelle
The spatio-temporal evolution of a downsized model for a desert dune is observed experimentally in a narrow water flow channel. A particle tracking method reveals that the migratio…
Growth of surface undulations at the Rosensweig instability
Holger Knieling, Reinhard Richter, Ingo Rehberg +2
We investigate the growth of a pattern of liquid crests emerging in a layer of magnetic liquid when subjected to a magnetic field oriented normally to the fluid surface. After a st…
Via Hexagons to Squares in Ferrofluids: Experiments on Hysteretic Surface Transformations under Variation of the Normal Magnetic Field
Christian Gollwitzer, Ingo Rehberg, Reinhard Richter
We report on different surface patterns on magnetic liquids following the Rosensweig instability. We compare the bifurcation from the flat surface to a hexagonal array of spikes wi…
The Surface Topography of a Magnetic Fluid -- a Quantitative Comparison between Experiment and Numerical Simulation
C. Gollwitzer, G. Matthies, R. Richter +2
The normal field instability in magnetic liquids is investigated experimentally by means of a radioscopic technique which allows a precise measurement of the surface topography. Th…
Hexagons become second if symmetry is broken
Bert Reimann, Reinhard Richter, Holger Knieling +2
Pattern formation on the free surface of a magnetic fluid subjected to a magnetic field is investigated experimentally. By tilting the magnetic field the symmetry can be broken in…
Does ohmic heating influence the flow field in thin-layer electrodeposition?
Matthias Schröter, Klaus Kassner, Ingo Rehberg +2
In thin-layer electrodeposition the dissipated electrical energy leads to a substantial heating of the ion solution. We measured the resulting temperature field by means of an infr…
Experimental investigation of the initial regime in fingering electrodeposition: dispersion relation and velocity measurements
Matthias Schröter, Klaus Kassner, Ingo Rehberg +2
Recently a fingering morphology, resembling the hydrodynamic Saffman-Taylor instability, was identified in the quasi-two-dimensional electrodeposition of copper. We present here me…