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Simulations of Particle Structuring Driven by Electric Fields

Monday, March 12, 2018 - 9:00am - 9:50am
Lind 305
Michael Miksis (Northwestern University)
Recent experiments show intriguing surface patterns when a uniform electric field is applied to a droplet covered with colloidal particles. Depending on the particle properties and the electric field intensity, particles organize into an equatorial belt, pole-to-pole chains, or dynamic vortices. Here we present simulations of the collective particle dynamics, which account for electrohydrodynamic and dielectrophoresis of particles. In order to better understand the collective particle dynamics, we will also discuss the solution of a model problem of a dielectric particle on a planar interface in an applied electric field. Analytical and numerical results will be presented including the derivation of the interaction force between two particles.