149 citations · 1.2k across the 38 of their papers we have counts for
16 papers · 1 filter
Electrohydrodynamic drift of a drop away from an insulating wall
Diptendu Sen, Mohammadhossein Firouznia, David Saintillan +1
An isolated charge-neutral drop suspended in an unbounded medium does not migrate in a uniform DC electric field. A nearby wall breaks the symmetry and causes the drop to drift tow…
Turbulent-like flows in quasi two-dimensional dense suspensions of motile colloids
Rui Luo, Alexey Snezhko, Petia M. Vlahovska
Dense bacterial suspensions exhibit turbulent-like flows at low Reynolds numbers, driven by the activity of the microswimmers. In this study, we develop a model system to examine t…
Drag force on spherical particles trapped at a liquid interface
Zhi Zhou, Petia M. Vlahovska, Michael J. Miksis
The dynamics of particles attached to an interface separating two immiscible fluids are encountered in a wide variety of applications. Here we present a combined asymptotic and num…
Tandem droplet locomotion in a uniform electric field
Chiara Sorgentone, Petia M. Vlahovska
An isolated charge-neutral droplet in a uniform electric field experiences no net force. However, a droplet pair can move in response to field-induced dipolar and hydrodynamic inte…
Note on the pairwise interactions of surfactant-covered drops in a uniform electric field
Chiara Sorgentone, Petia Vlahovska
We study the effect of surfactant on the pairwise interactions of drops in an applied uniform DC electric field using a combination of numerical simulations based on a boundary int…
Numerical and asymptotic analysis of the three-dimensional electrohydrodynamic interactions of drop pairs
Chiara Sorgentone, Jeremy I. Kach, Aditya S. Khair +2
We study the pairwise interactions of drops in an applied uniform DC electric field within the framework of the leaky dielectric model. We develop three-dimensional numerical simul…
Optimal cell transport in straight channels and networks
Alexander Farutin, Zaiyi Shen, Gael Prado +9
Flux of rigid or soft particles (such as drops, vesicles, red blood cells, etc.) in a channel is a complex function of particle concentration, which depends on the details of induc…
Blood crystal: emergent order of red blood cells under wall-confined shear flow
Zaiyi Shen, Thomas M. Fischer, Alexander Farutin +3
Driven or active suspensions can display fascinating collective behavior, where coherent motions or structures arise on a scale much larger than that of the constituent particles.…
Colloidal particle electrorotation in a non-uniform electric field
Yi Hu, Petia M. Vlahovska, Michael J. Miksis
A model to study the dynamics of colloidal particles in nonuniform electric fields is proposed. For an isolated sphere, the conditions and threshold for sustained (Quincke) rotatio…
Electrohydrodynamic deformation and rotation of a particle-coated drop
Malika Ouriemi, Petia M. Vlahovska
A dielectric drop suspended in conducting liquid and subjected to an uniform electric field deforms into an ellipsoid whose major axis is either perpendicular or tilted (due to Qui…
Periodic and chaotic orbits of plane-confined micro-rotors in creeping flows
Enkeleida Lushi, Petia M. Vlahovska
We explore theoretically the complex dynamics and emergent behaviors of spinning spheres immersed in viscous fluid. The particles are coupled to each-other via the fluid in which t…
Nonlinear electrohydrodynamics of a viscous droplet
Paul F. Salipante, Petia M. Vlahovska
A classic result due to G.I.Taylor is that a drop placed in a uniform electric field becomes a prolate or oblate spheroid, which is axisymmetrically aligned with the applied field.…
Vesicle electrohydrodynamics
Jonathan T. Schwalbe, Petia M. Vlahovska, Michael J. Miksis
A small amplitude perturbation analysis is developed to describe the effect of a uniform electric field on the dynamics of a lipid bilayer vesicle in a simple shear flow. All media…
On the complex dynamics of a red blood cell in simple shear flow
Petia M. Vlahovska, Yuan-nan Young, Gerrit Danker +1
Motivated by the reported peculiar dynamics of a red blood cell in shear flow, we develop an analytical theory for the motion of a nearly--spherical fluid particle enclosed by a vi…
Drop Behavior in Uniform DC Electric Field
Paul F. Salipante, Petia M. Vlahovska
Drop deformation in uniform electric fields is a classic problem. The pioneering work of G.I.Taylor demonstrated that for weakly conducting media, the drop fluid undergoes a toroid…
Surfactant-induced migration of a spherical drop in Stokes flow
James A. Hanna, Petia M. Vlahovska
In Stokes flows, symmetry considerations dictate that a neutrally-buoyant spherical particle will not migrate laterally with respect to the local flow direction. We show that a los…