Developed to address the drawbacks of electro-wetting, electro-dewetting is a digital microfluidic technique that makes liquid dewet on substrate using an electric potential. In this paper, we propose electrohydrodynamic model describe dynamic evolution charged slender drop under influence external field. We introduce lubrication theory simplify and reproduce fundamental operations, including d...

Microscale fluidic manipulation using traveling-wave, induction electrohydrodynamics is demonstrated. A three-phase traveling-wave device fabricated for the experiments provides a temporally and spatially varying electric field which helps induce ions in a fluid subject to a temperature gradient. These ions are moved as the traveling wave propagates, resulting in a drag force being exerted on t...

In this work, the effect of applying an electric field on droplet formation in a T-junction microfluidic device is examined by simulations based on a recent technique known as lattice Boltzmann method (LBM). The electric field is applied in the main channel just beyond the confluence of the continuous and dispersed phases. A combined electrohydrodynamics-multiphase model that can simulate the f...

Active manipulation of cells, such as trapping, focusing, and isolation, is essential for various bioanalytical applications. Herein, we report a hybrid electrokinetic technique for manipulating mammalian cells in physiological fluids. This technique applies a combination of negative dielectrophoretic force and hydrodynamic drag force induced by electrohydrodynamics, which is effective in condu...

Electrohydrodynamics (EHD) refers to the direct conversion of electrical energy into mechanical energy of a fluid. Through the use of mobile electrodes, this principle is exploited in a novel fashion for designing and testing a millimeter-scale untethered robot, which is powered harvesting the energy from an external electric field. The robot is designed as an inverted sail-boat, with the thrus...

The physico-chemistry of surfactants (amphiphilic surface active agents) is often used to control the dynamics viscous drops and bubbles. Surfactant sorption kinetics has been shown play a critical role in deformation extensional shear flows, yet best our knowledge these effects on drop an electric fieldhave not accounted for. In this paper we numerically investigate surfactant-covered field. O...

A weakly conducting liquid droplet immersed in another leaky dielectric can exhibit rich dynamical behaviors under the effect of an applied electric field. Depending on material properties and field strength, nonlinear coupling interfacial charge transport fluid flow trigger electrohydrodynamic instabilities that lead to shape deformations complex dynamics. We present a spectral boundary integr...

In this work, the nonlinear boundary value problem in electrohydrodynamics flow of a fluid in an ion-drag configuration in a circular cylindrical conduit is studied numerically. An effective collocation method, which is based on orthonormal Bernstein polynomials is employed to simulate the solution of this model. Some properties of orthonormal Bernstein polynomials are introduced and utilized t...