BOILING HEAT TRANSFER CHARACTERISTICS ON A VERTICAL SURFACE UNDER PULSED ELECTRIC FIELD: A LATTICE BOLTZMANN STUDY

The electric field can control the bubble behavior during boiling heat transfer, which is important to enhance the heat dissipation of the heated surface. However, most existing studies have focused on uniform electric field conditions. The mechanism of boiling heat transfer under the action of pulsed electric field is still unclear. In this study, we investigate the effect of pulsed electric fields on the boiling characteristics of vertical surfaces via the lattice Boltzmann method. We have analyzed the effects of electric field strength, pulse period, duty cycle, dielectric constant ratio, and wall superheat on nucleation, growth, merging, and departure during boiling heat transfer. Further, we reveal the mechanisms of the changes in liquid supply capacity and wall heat transfer performance induced by bubble behavior under pulsed electric field. The results are informative for the design of heat dissipation techniques with electric field-enhanced vertical heated surfaces.