79 citations · 887 across the 44 of their papers we have counts for
5 papers · 1 filter
Influence of surface tension on the conical miniscus of a magnetic fluid in the field of a current-carrying wire
Thomas John, Dirk Rannacher, Andreas Engel
We study the influence of surface tension on the shape of the conical miniscus built up by a magnetic fluid surrounding a current-carrying wire. Minimization of the total energy of…
Double Rosensweig instability in a ferrofluid sandwich structure
Dirk Rannacher, Andreas Engel
We consider a horizontal ferrofluid layer sandwiched between two layers of immiscible non-magnetic fluids. In a sufficiently strong vertical magnetic field the flat interfaces betw…
Ferrofluids as thermal ratchets
Andreas Engel, Hanns Walter Mueller, Peter Reimann +1
Colloidal suspensions of ferromagnetic nano-particles, so-called ferrofluids, are shown to be suitable systems to demonstrate and investigate thermal ratchet behavior: By rectifyin…
On the electromagnetic force on a polarizable body
A. Engel, R. Friedrichs
The force on a macroscopic polarizable body in an inhomogenous electromagnetic field is calculated for three simple exactly solvable situations. Comparing different approaches we p…
Comment on "Invalidation of the Kelvin Force in Ferrofluids"
A. Engel
It is shown that the experimental results reported in cond-mat/0010412 do not invalidate the well-known expression for the Kelvin force density in ferrofluids.