48 citations · 135 across the 18 of their papers we have counts for
19 papers
Hydrodynamic Origin of Friction Between Suspended Rough Particles
Jake Minten, Bhargav Rallabandi
Tangential interactions between particles play a central role in suspension rheology. We show theoretically that these interactions, often attributed to contact friction, are a dir…
Enhancement and Suppression of Active Particle Movement Due to Membrane Deformations
Adam Hitin Bialus, Bhargav Rallabandi, Naomi Oppenheimer
Microswimmers and active colloids often move in confined systems, including those involving interfaces. Such interfaces, especially at the microscale, may deform in response to the…
Inertio-viscous interactions between particles in oscillatory flow
Xiaokang Zhang, Bhargav Rallabandi
We study the interaction between a pair of particles suspended in a uniform oscillatory flow. The time-averaged behavior of particles under these conditions, driven by inertial and…
Wind-driven collisions between floes explain the observed dispersion of Arctic sea ice
Bryan Shaddy, P. Alex Greaney, Bhargav Rallabandi
The transport of sea ice over the polar oceans plays an important role in climate. This transport is driven predominantly by turbulent winds, leading to stochastic motion of ice fl…
Non-monotonic frictional behavior in the lubricated sliding of soft patterned surfaces
Arash Kargar-Estahbanati, Bhargav Rallabandi
We study the lubricated contact of sliding soft surfaces that are locally patterned but globally cylindrical, held together under an external normal force. The local patterns repre…
Elasto-inertial rectification of oscillatory flow in an elastic tube
Xirui Zhang, Bhargav Rallabandi
The interaction between deformable surfaces and oscillatory driving is known to yield complex secondary time-averaged flows due to inertial and elastic nonlinearities. Here, we rev…
Time-averaged Dynamics of Compressible Particles in Oscillatory Gradient Flows
Xiaokang Zhang, Jake Minten, Bhargav Rallabandi
Acoustic fields effect steady transport of suspended particles by rectifying the inertia of primary oscillations. We develop a fully analytic theory that relates this steady partic…
Three-dimensional streaming around an obstacle in a Hele-Shaw cell
Xirui Zhang, Bhargav Rallabandi
The application of oscillatory flow around an obstacle drives a steady ``streaming'' due to inertial rectification, which has been used in a host of microfluidic applications. Whil…
An unrecognized force in inertial microfluidics
Siddhansh Agarwal, Fan Kiat Chan, Mattia Gazzola +1
Describing effects of small but finite inertia on suspended particles is a fundamental fluid dynamical problem that has never been solved in full generality. Modern microfluidics h…
CO-driven diffusiophoresis for removal of bacteria
Suin Shim, Sepideh Khodaparast, Ching-Yao Lai +5
We investigate CO-driven diffusiophoresis of colloidal particles and bacterial cells in a Hele-Shaw geometry. Combining experiments and a model, we understand the characteristi…
Size-dependent particle migration and trapping in 3D microbubble streaming flows
Andreas Volk, Massimiliano Rossi, Bhargav Rallabandi +3
Acoustically actuated sessile bubbles can be used as a tool to manipulate microparticles, vesicles and cells. In this work, using acoustically actuated sessile semi-cylindrical mic…
Rotation of a submerged finite cylinder moving down a soft incline
Baudouin Saintyves, Bhargav Rallabandi, Theo Jules +5
A submerged finite cylinder moving under its own weight along a soft incline lifts off and slides at a steady velocity while also spinning. Here, we experimentally quantify the ste…
Representative subsampling of sedimenting blood
Bhargav Rallabandi, Janine K. Nunes, Antonio Perazzo +2
It is often necessary to extract a small amount of a suspension, such as blood, from a larger sample of the same material for the purposes of diagnostics, testing or imaging. A pra…
Curvature regularization near contacts with stretched elastic tubes
Bhargav Rallabandi, Joel Marthelot, P. -T. Brun +1
Bringing a rigid object into contact with a soft elastic tube causes the tube to conform to the surface of the object, resulting in contact lines. The curvature of the tube walls n…
Motion of hydrodynamically interacting active particles
Bhargav Rallabandi, Fan Yang, Howard A. Stone
We develop a general hydrodynamic theory describing a system of interacting actively propelling particles of arbitrary shape suspended in a viscous fluid. We model the active part…
A reciprocal theorem for the prediction of the normal force induced on a particle translating parallel to an elastic membrane
Abdallah Daddi-Moussa-Ider, Bhargav Rallabandi, Stephan Gekle +1
When an elastic object is dragged through a viscous fluid tangent to a rigid boundary, it experiences a lift force perpendicular to its direction of motion. An analogous lift mecha…
Surfing its own wave: hydroelasticity of a particle near a membrane
Bhargav Rallabandi, Naomi Oppenheimer, Matan Yah Ben Zion +1
We show using theory and experiments that a small particle moving along an elastic membrane through a viscous fluid is repelled from the membrane due to hydro-elastic forces. The v…
Rotation of an immersed cylinder sliding near a thin elastic coating
Bhargav Rallabandi, Baudouin Saintyves, Theo Jules +4
It is known that an object translating parallel to a soft wall in a viscous fluid produces hydro- dynamic stresses that deform the wall, which, in turn, results in a lift force on…
Three-dimensional phenomena in microbubble acoustic streaming
Alvaro Marin, Massimiliano Rossi, Bhargav Rallabandi +3
Ultrasound-driven oscillating micro-bubbles have been used as active actuators in microfluidic devices to perform manifold tasks such as mixing, sorting and manipulation of micropa…