Flow Electrification During Melting of Frozen Dielectric Liquids
A. Mizuno1, G. Touchard2, and T. Paillat2
1Department of Environmental and Life Sciences, Toyohashi University of Technology, Japan
2Electrofluidodynamic group, P' Institute, University of Poitiers, CNRS, France
Abstract- We already have presented experiments made with melting dodecane (ISEHD 2014, Okinawa, Japan). These previous experiments were made with a cone of dodecane frozen either in liquid nitrogen or in thermostatic bath. In both cases, moisture could deposit on the frozen cone during melting which may change the interface behavior. In order to avoid such situation, we decided to make a new setup in which the dielectric liquid or solid is never in contact with ambient air but remains inside a closed chamber. In this paper we will describe this new setup and the measuring protocol. Then we will present experiments made with cyclohexane doped with several concentration of additives. Even if it is very weak, the charge transported by the droplets seems indicate that a flow electrification process exists. Furthermore, we will examine the evolution of the resistivity with the concentration in additive.
Keywords-Flow electrification, charge transfer, melting process