电介质
润湿
机械
接触角
电场
材料科学
微流控
表面张力
联轴节(管道)
数字微流体
电压
瞬态(计算机编程)
流量(数学)
电润湿
纳米技术
光电子学
复合材料
物理
热力学
计算机科学
量子力学
操作系统
作者
Tao Wu,Tianyi Wang,Xiaohan He,Juncheng Zhao,Hong Yan,Teng Zhou,Liuyong Shi
标识
DOI:10.1002/elps.202300296
摘要
Abstract To explore the optoelectronic wetting droplet transport mechanism, a transient numerical model of optoelectrowetting (OEW) under the coupling of flow and electric fields is established. The study investigates the impact of externally applied voltage, dielectric constant of the dielectric layer, and interfacial tension between the two phases on the dynamic behavior of droplets during transport. The proposed model employs an improved Young's equation to calculate the instantaneous voltage and contact angle of the droplet on the dielectric layer. Results indicate that, under the influence of OEW, significant variations in the interface contact angle of droplets occur in bright and dark regions, inducing droplet movement. Moreover, the dynamic behavior of droplet transport is closely associated with various parameters, including externally applied voltage, dielectric layer material, and interfacial tension between the two phases, all of which impact the contact angle and, consequently, the transport process. By summarizing the influence patterns of the three key parameters studied, the optimization of droplet transport performance is achieved. The study employs two‐dimensional simulation models to emulate the droplet motion under the influence of the electric field, investigating the OEW droplet transport mechanism. The continuous movement of droplets involves three stages: initial wetting, continuous transport, and reaching a steady position. The findings contribute theoretical support for the efficient design of digital microfluidic devices for OEW droplet movement and the selection of key parameters for droplet manipulation.
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