An energy-based model for electrowetting-induced droplet actuation
An energy-based model for electrowetting-induced droplet actuation
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DOI：
10.1088/0960-1317/16/8/009
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发表时间：
2006-08-01
影响因子：
2.3
通讯作者：
Garimella, S. V.
中科院分区：
文献类型：
--
作者：
Bahadur, V.;Garimella, S. V.
电润湿诱导液滴运动在微流体领域有着广阔的应用前景，在过去的十年中，人们对电润湿诱导液滴运动进行了研究。本文展示了潜在的能量为基础的分析建模的EW为基础的流体驱动系统的性能。基于系统能量最小化的分析提供了简化的建模工具来预测电子战系统的整体性能，同时避免了对系统中众多复杂性进行建模的需要。一个分析模型的开发，以估计驱动力的液滴在两个电极之间移动。分析了驱动力各分量的来源和贡献。的介电参数，电极布局，液滴的几何形状和形状的影响进行了讨论，以最大限度地提高驱动力的目标。结合驱动力模型与半解析模型，用于预测反对液滴运动的力，以开发预测瞬态EW诱导液滴运动的模型。参数的结果得到评估工作电压，流体性质和液滴的几何形状对液滴运动的重要性。
Electrowetting (EW) induced droplet motion has been explored in the past decade in view of its promising applications in the field of microfluidics. This paper demonstrates the potential of energy-based analyses for modeling the performance of EW-based fluid actuation systems. Analyses based on system energy minimization offer simplified modeling tools to predict the overall performance of EW systems while circumventing the need to model the numerous complexities in the system. An analytical model is developed to estimate the actuation force on a droplet moving between two electrodes. The origins and contributions of various components of the actuation force are analyzed. The effects of dielectric parameters, electrode layout, droplet geometry and shape are discussed with the objective of maximizing the actuation force. The actuation force model is combined with semi-analytical models for predicting the forces opposing droplet motion to develop a model that predicts transient EW-induced droplet motion. Parametric results are obtained to evaluate the importance of operating voltage, fluid properties and droplet geometry on droplet motion.