LAUSR

A Numerical study has been performed on a single bubble growth under the action of electric fields. In this work, a CFD framework is formulated which couples the electrohydrodynamic forces with level set based interface capturing model to understand the effect of electrohydrodynamic forces on a single bubble. Two different gravity levels are used for the analysis. The study is conducted for five different contact angles (0°, 30 ° , 60 ° , 90 ° and 120 ° ). The Electrohydrodynamic effects are studied for three different voltages of 1 kV, 2 kV and 5 kV on both gravity levels. The bubble departure diameter, time and bubble volume are presented for different cases. It can be observed from the results that the bubble departure time is high for microgravity condition compared to normal gravity condition in the absence of electric fields. On the application of electric field, the departure time is reduced significantly under high voltages even under microgravity conditions. Thus indicating the potential power of EHD for delaying the onset of film boiling which imply the delay of Critical Heat Flux (CHF).