The response time for maximum drop deformation and its comparison with different time scales is established and verified with experiments. The applied fluctuation is achieved by applying a single wave perturbation of electrowetting with desired amplitude and frequency. To pinpoint the importance of the initial actuation conditions, the variance in the maximum drop deformation for a single wave perturbation is studied. The focus of this study was to analyze the maximum deformation of a drop for a wide range of actuation mechanism with a varied drop or surrounding medium viscosities. The drop response to this cyclic actuation is compared with the equivalent mass–spring–dampener system, and limitations of this approach are identified. Interestingly, the qualitative results were similar between the air and liquid medium cases, but the attainment of equilibrium configuration was dissimilar. As anticipated, the higher actuation magnitude and frequency deformed the drop significantly and thus altered the drop configuration. Higher viscosity of drops and the surrounding medium delayed the time to achieve the maximum deformation. Accurately predicting the time required for a drop to attain the maximum deformation is paramount for optimizing processes and based on microfluidics technology.

中文翻译：

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对单波电动激励的静滴响应

建立了最大液滴变形的响应时间及其与不同时间尺度的比较，并通过实验进行了验证。施加的波动是通过施加具有所需幅度和频率的电润湿的单波扰动来实现的。为了查明初始驱动条件的重要性，研究了单波扰动的最大液滴变形的变化。本研究的重点是分析具有不同液滴或周围介质粘度的各种驱动机制下液滴的最大变形。对这种循环驱动的下降响应与等效质量-弹簧-阻尼器系统进行了比较，并确定了这种方法的局限性。有趣的是，空气和液体介质情况下的定性结果相似，但平衡配置的实现是不同的。正如预期的那样，较高的驱动幅度和频率使液滴显着变形，从而改变了液滴配置。液滴和周围介质的较高粘度延迟了实现最大变形的时间。准确预测液滴达到最大变形所需的时间对于优化流程和基于微流体技术至关重要。