@Article{CiCP-20-3,
author = {},
title = {A Contact Line Dynamic Model for a Conducting Water Drop on an Electrowetting Device},
journal = {Communications in Computational Physics},
year = {2016},
volume = {20},
number = {3},
pages = {811--834},
abstract = {<p style="text-align: justify;">The static shape of drop under electrowetting actuation is well studied and
recent electrowetting theory and experiments confirm that the local contact angle (microscopic
angle) is unaffected while the apparent contact angle (macroscopic angle) is
characterized by the Lippmann-Young equation. On the other hand, the evolution of
the drop motion under electrowetting actuation has received less attention. In this paper,
we investigate the motion of a conducting water drop on an electrowetting device
(EWD) using the level set method. We derive a contact line two-phase flow model
under electrowetting actuation using energy dissipation by generalizing an existing
contact line model without the electric field. Our model is consistent with the static
electrowetting theory as the dynamic contact angle satisfies the static Young&#39;s equation
under equilibrium conditions. Our steady state results show that the apparent
contact angle predicted by our model satisfies the Lippmann-Young&#39;s relation. Our
numerical results based on the drop maximum deformation agree with experimental
observations and static electrowetting theory. Finally, we show that for drop motion
our results are not as good due to the difficulty of computing singular electric field accurately.
Nonetheless, they provide useful insights and a meaningful first step towards
the understanding of the drop dynamics under electrowetting actuation.</p>},
issn = {1991-7120},
doi = {https://doi.org/10.4208/cicp.200114.090316a},
url = {https://global-sci.com/article/80219/a-contact-line-dynamic-model-for-a-conducting-water-drop-on-an-electrowetting-device}
}