Enhanced condensation of droplets under corona discharge: An experimental study and Dissipative Particle Dynamics interpretation

Electric-field enhanced (EFE) condensation has emerged as an effective external field stimuli technology in manipulating the formation of droplets and promoting controlled condensation processes. This study investigates the enhanced condensation of charged droplets under corona discharge. A cost-effective adaptive threshold algorithm facilitated the identification and analysis of droplet morphology and particle size distribution, revealing distinct characteristics under corona discharge. Experimental findings unveiled a radial spreading pattern of droplet growth under the electric field, resulting in larger droplet sizes before shedding than conditions without the electric field. Dissipative particle dynamics (DPD) simulation on charged water beads was established to provide a mesoscopic interpretation for the enhancement in droplet condensation. Simulation results indicated that reduced mixing free energy between charged water molecule clusters contributed to the enhanced droplet condensation as increased viscosity and surface tension under corona discharge thermodynamically favored droplet cluster growth. This work would offer insights into previously unexplored facets of the corona discharge-enhanced condensation, paving the way for advancements in thermal management and energy conversion technologies. [Display omitted] •Radial spreading growth pattern in corona discharge-enhanced condensation leads to larger droplets.•Adaptive threshold algorithm facilitates efficient analysis of droplet morphology and size distribution.•DPD simulations reveal reduced mixing free energy as a key factor enhancing droplet condensation.•Increased viscosity and surface tension under corona discharge thermodynamically favor droplet cluster growth.•Water beads model advances understanding of corona discharge-enhanced condensation.