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<p>The article proposes a theoretical model of EWOD (electrowetting–on–dielectric) taking into account the saturation of the dynamic contact angle using the example of forced oscillations of an electrolyte droplet in a spatially inhomogeneous alternating electric field. This droplet is clamped between two plates, which are electrodes. The inhomogeneity of the plate surface is described by an individual function, which is a wetting parameter and a proportionality coefficient between the contact line velocity and the contact angle deviation. It is shown that the surface inhomogeneity leads to the excitation of additional modes, the spectrum of which is determined by the function describing this inhomogeneity. It is found that the surface inhomogeneity can change the saturation angle. Qualitative agreement with experiments is shown.</p>

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Droplet Forced Oscillations by Electrowetting-on-Dielectric (EWOD) with Contact Angle Saturation

  • 期刊论文

  • 发表日期：

    2026年1月13日

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  • Aleksey A. Alabuzhev,
  • Marina A. Pyankova

摘要

The article proposes a theoretical model of EWOD (electrowetting–on–dielectric) taking into account the saturation of the dynamic contact angle using the example of forced oscillations of an electrolyte droplet in a spatially inhomogeneous alternating electric field. This droplet is clamped between two plates, which are electrodes. The inhomogeneity of the plate surface is described by an individual function, which is a wetting parameter and a proportionality coefficient between the contact line velocity and the contact angle deviation. It is shown that the surface inhomogeneity leads to the excitation of additional modes, the spectrum of which is determined by the function describing this inhomogeneity. It is found that the surface inhomogeneity can change the saturation angle. Qualitative agreement with experiments is shown.