Abstract
The minimum and maximum flow rates (Qmin, Qmax) limit the operational window of electrospraying (cone-jet mode). Literature does not give a general, experimentally proven, useable formula. We derived with fundamental physics and curve fitting a relation between Qmin and Qo(=εoγρK) , for Newtonian liquids with low/moderately high viscosities. The formula is corroborated by own experiments and data from literature. With the formula Qmin can be obtained by only measuring some properties of the liquid to be sprayed. Qmax, is difficult to address. An empirical result and experimental data indicate a ratio of Qmax/Qmin between some tens and some hundreds.
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