Recent advancement in electrowetting technique has attracted the attention of researchers due to its numerous applications in lab-on-chip microfluidic devices. In the present work, an interdigitated electrode (IDE) configuration is introduced for producing oscillating droplets for heat dissipation in electronic devices. It resolves the problem of interfering wire used as an electrode in conventional methods of producing droplet oscillation. The dynamics of droplet oscillation and heat transfer effectiveness have been investigated for different voltages, frequencies, and droplet volumes. The time history of the instantaneous contact angle, contact radius, and height of the droplet have been analyzed for sinusoidal AC voltages. Moreover, oscillation dynamics with IDE configuration have been compared with that produced by the conventional method. The oscillation frequency of the droplet is higher in the IDE configuration than the droplet oscillation with wire. The frequency of the droplet oscillation is observed more than twice the applied frequency. The change in apparent contact angle increases with the applied voltage. In the presence of wire, the droplet exhibits translational behavior rather than oscillation below 20 Hz. The first resonant frequency of the droplet oscillation is reduced from 30 Hz in wire configuration to 10 Hz in the IDE configuration. The heat transfer performance of the oscillating droplet has been calculated from the time required for complete droplet evaporation with and without oscillation. Heat transfer performance is maximum at the first resonant frequency and decreases with an increase in applied frequency. The droplet evaporation rate decreases with the volume of the droplet, whereas it increases with the applied heat flux. The present work establishes that electrowetting actuated droplet oscillation over IDE can be implemented as an effective and scalable technique for cooling of hotspots in electronic devices.

电润湿技术的最新进展由于其在芯片实验室微流控设备中的大量应用而吸引了研究人员的注意。在本发明中，引入了叉指电极（IDE）构造以产生用于电子设备中的散热的振荡液滴。它解决了在产生液滴振荡的常规方法中用作电极的干扰线的问题。对于不同的电压，频率和液滴体积，已经研究了液滴振荡的动力学和传热效率。对于正弦交流电压，已经分析了瞬时接触角，接触半径和液滴高度的时间历程。此外，已将具有IDE配置的振动动力学与传统方法产生的振动动力学进行了比较。在IDE配置中，微滴的振荡频率高于带导线的微滴振荡。观察到液滴振荡的频率是所施加频率的两倍以上。视在接触角的变化随施加电压的增加而增加。在金属丝存在的情况下，液滴表现出平移行为，而不是低于20 Hz的振荡。液滴振荡的第一共振频率从线配置的30 Hz降低到IDE配置的10 Hz。振荡液滴的传热性能是根据有和没有振荡的完全液滴蒸发所需的时间计算得出的。传热性能在第一谐振频率处最大，并随着施加频率的增加而降低。液滴的蒸发速率随着液滴的体积而降低，而随着所施加的热通量而增加。本工作确立了可以将IDE上电润湿驱动的液滴振荡实现为一种有效且可扩展的技术，用于冷却电子设备中的热点。