Bubble Formation in Film Boiling Including Electrohydrodynamic Forces

The phenomenon of bubble formation and its detachment from the liquid-vapor interface is highly affected by the application of electric field due to the electrohydrodynamic (EHD) forces. A numerical study is performed using a CLSVOF (Combined level- set and volume of fluid) solver for interface tracking, to analyse the changes in nature of bubble growth in film boiling with the changes in degree of superheat and with the electrohydrodynamic forces. The instability behaviour at the interface changes from Rayleigh-Taylor to Taylor-Helmholtz as the degree of superheat is increased. EHD forces results in the increase in the bubble formation sites due to the decrease in the critical wavelength.