  Electrospraying is a widely-used technique for generating microspherical
droplets in biomedical and chemical applications and considered as an effective
approach for the deposition on substrate. However, studies on effects of
controllable parameters on deposition area of electrosprayed droplets have not
been reported yet. In this study, a simplified two-dimensional model is
developed to study the dynamic process of droplets and electrosprayed area. The
effects of distance between the needle tip and collector, and syringe feed rate
on the size of sprayed area are quantified. Experiments have been conducted to
validate the simulation results. Both modeling and experimental data
demonstrate that the diameter of sprayed area increases with increased distance
between the tip and collector as well as feed rate. This fundamental
understanding should contribute to a wise choice of controllable parameters to
achieve an efficient utilization of electrosparyed droplets or substrate for
real applications.
