Three mathematical models for predicting the diameter of electrospun fibers were established respectively by Fridrikh

Spivak

Stepanyan from the electrospinning mechanism so far. The two main parameters of the ahead two models are the surface tension of solution and volume charge density of jet. The two main parameters of the Stepanyan model are zero shear viscosity of electrospun solution and volume charge density of jet. On the basis of the experimental reports of power exponents between the electrospun fiber diameter and the three parameters at present

The experimental results generally are not consistent with the model predictions. The main reasons of resulting in the disagreements are: (1) The mathematical models are based on Newtonian fluid

but non-newtonian fluids have already been the main electrospun objects; (2) Neither of the three parameters is not independent variables

etc. The respect research directions of electrospinning were put forward.