Jumping velocity of an electrowetting-actuated droplet: A theoretical and numerical study
Jiayu Du, Nikolaos T. Chamakos, Athanasios G. Papathanasiou, Yanzhi Li, Qi Min
Abstract
In this study, we numerically and theoretically investigate the electrowetting-induced detachment of liquid droplets. An analytical model adopting the energy balance approach is derived to predict the jumping velocity of an electrowetting-actuated droplet, which comprehensively accounts for the influence of liquid properties, droplet size and applied voltage. Our main contribution is to reformulate the models of four energy components including the surface energy, kinetic energy, gravitational potential energy at detachment, as well as the viscous dissipation of entire recoiling. The necessity to correct these energy components has also been physically explained.
Topics & Concepts
ElectrowettingMechanicsDissipationKinetic energyEnergy balanceEnergy (signal processing)Potential energyVoltagePhysicsMaterials scienceClassical mechanicsThermodynamicsQuantum mechanicsElectrowetting and Microfluidic TechnologiesElectrohydrodynamics and Fluid DynamicsSurface Modification and Superhydrophobicity