  Nowadays, several models of unidimensional fluid jets exploit discrete
element methods. In some cases, as for models aiming at describing the
electrospinning nanofabrication process of polymer fibers, discrete element
methods suffer a non constant resolution of the jet representation. We develop
a dynamic mesh-refinement method for the numerical study of the
electro-hydrodynamic behavior of charged jets using discrete element methods.
To this purpose, we import ideas and techniques from the string method
originally developed in the framework of free-energy landscape simulations. The
mesh-refined discrete element method is demonstrated for the case of
electrospinning applications.
