  The effects of a driven fast-oscillating spinneret on the bending instability
of electrified jets, leading to the formation of spiral structures in
electrospinning experiments with charged polymers, are explored by means of
extensive computer simulations. It is found that the morphology of the spirals
can be placed in direct correspondence with the oscillation frequency and
amplitude. In particular, by increasing the oscillation amplitude and
frequency, thinner fibres can be extracted by the same polymer material,
thereby opening design scenarios in electrospinning experiments.
