Bubble shape under the action of electric forces

摘要: Abstract In the present paper, a study of bubble dynamics in adiabatic conditions (i.e. with no heat and mass transfer) is carried out order to understand fundamental physics ruling evolution their interface, open way comprehension more complex transfer issues involving them. An external electric field applied system investigate potentiality this technique enhance phase separation transfer. A new numerical method for EHD action on growing has been developed combining VOF level-set methods. To experimentally validate it, well-defined simple boundary have selected: all forms excluded from system, an axisymmetric configuration chosen adopt 2-D simulation. experimental apparatus steady stemming orifice still fluid (FC-72) produced, dc potential up 20 kV was ring-shaped electrode coaxial orifice. way, first instance, dynamical effects eliminated, clear location three contact line, which pinned orifice, defined. The profile obtained experiment digitized compared successfully outcomes method. Furthermore, local curvature interface allowed development theory electrical stress be included capillary equation, compares well data. Finally, validated used predict shape absence gravity, preparation microgravity experiments.