Projects per year
We consider, both theoretically and experimentally, the deformation due to an electric field of a pinned nearly-hemispherical static sessile drop of an ionic fluid with a high conductivity resting on the lower substrate of a parallel-plate capacitor. Using both numerical and asymptotic approaches we find solutions to the coupled electrostatic and augmented Young–Laplace equations which agree very well with the experimental results. Our asymptotic solution for the drop interface extends previous work in two ways, namely to drops that have zero-field contact angles that are not exactly π/2 and to higher order in the applied electric field, and provides useful predictive equations for the changes in the height, contact angle and pressure as functions of the zero-field contact angle, drop radius, surface tension and applied electric field. The asymptotic solution requires some numerical computations, and so a surprisingly accurate approximate analytical asymptotic solution is also obtained.
|Number of pages||20|
|Journal||Physics of Fluids|
|Publication status||Published - 19 Dec 2014|
- conducting drop
- electrical field
- Young–Laplace equations
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- Mathematics And Statistics - Visiting Professor
Person: Visiting Professor
- 1 Finished
Anisotropic liquid dielectrophoresis and interfacial forces
Wilson, S., Brown, C., Tsakonas, C., Duffy, B., Mottram, N. & Corson, L.
EPSRC (Engineering and Physical Sciences Research Council)
1/03/12 → 28/02/15