Theoretical and experimental study (linear stability and Malvern granulometry) on electrified jets of diesel oil in atomization regime

In this article we present a theoretical, numerical and experimental study on electrified jets. The theoretical part of the study is a linear analysis of the stability of electrified viscous jets of diesel oil taking into account the effects of inertia, surface tension, viscous, aerodynamic and electric forces. We start from a usual linear analysis of stability for viscous jets and add the Maxwellʹs tensor terms corresponding to the only presence of the electric charges at the interface between the liquid and the air (no external electric field). We finally obtain the dimensional dispersion relation of the problem. In a second part we solve the dispersion equation numerically and analyse the role of the electric parameter on the destabilization of the jet in various configurations. In the third part of the article we give our experimental results obtained on electrified jets of diesel oil with a laser granulometry system (Malvernʹs Spraytec).