108 citations · 305 across the 10 of their papers we have counts for
11 papers
The ultimate state of elastic turbulence
Piyush Garg, Marco Edoardo Rosti
The asymptotic properties, with vanishing viscosity, of inertial turbulence in Newtonian fluids have been of intense scrutiny over the years. Much less is known about elastic turbu…
Waves dictate the yo-yoing decay of a viscoelastic mixing layer
Giulio Foggi Rota, Piyush Garg, Jason Tang +1
We find that waves develop in a time-decaying mixing layer of viscoelastic fluid, leading the mean-flow to yo-yo. This is in sharp contrast with Newtonian fluids, where laminar mix…
Orientation dynamics of a spheroid in the simple shear flow of a weakly elastic fluid
Pavan Kumar Singeetham, Deepak Madival, Piyush Garg +1
We investigate the orientation dynamics of a neutrally buoyant spheroid, of an arbitrary aspect ratio (), freely rotating in a weakly viscoelastic fluid undergoing simple shear…
Anomalous dispersion of microswimmer populations
Laxminarsimharao Vennamneni, Piyush Garg, Ganesh Subramanian
We examine the longitudinal dispersion of spheroidal microswimmers in pressure-driven channel flow. When time scales corresponding to swimmer orientation relaxation, and diffusion…
Inertio-elastic instability of a vortex column
Anubhab Roy, Piyush Garg, Jhumpal Shashikiran Reddy +1
We analyze the instability of a vortex column in a dilute polymer solution at large and with , the elasticity num…
The center-mode instability of viscoelastic plane Poiseuille flow
Mohammad Khalid, Indresh Chaudhary, Piyush Garg +2
A modal stability analysis shows that plane Poiseuille flow of an Oldroyd-B fluid becomes unstable to a `center mode' with phase speed close to the maximum base-flow velocity, $U_{…
Linear instability of viscoelastic pipe flow
Indresh Chaudhary, Piyush Garg, Ganesh Subramanian +1
A modal stability analysis shows that pressure-driven pipe flow of an Oldroyd-B fluid is linearly unstable to axisymmetric perturbations, in stark contrast to its Newtonian counter…
Enhanced velocity fluctuations in interacting swimmer suspensions
Sankalp Nambiar, Piyush Garg, Ganesh Subramanian
A dilute non-interacting suspension of micro-swimmers exhibits a finite velocity variance and short-ranged correlations that decay over a swimmer length. For a suspension of intera…
Concentration banding instability of a sheared bacterial suspension
Laxminarsimharao V, Piyush Garg, Ganesh Subramanian
We demonstrate a novel shear-induced mechanism for growth of concentration fluctuations in a bacterial suspension. Using a linear stability analysis, a homogeneously sheared suspen…
Viscoelastic pipe flow is linearly unstable
Piyush Garg, Indresh Chaudhary, Mohammad Khalid +2
Newtonian pipe flow is known to be linearly stable at all Reynolds numbers. We report, for the first time, a linear instability of pressure driven pipe flow of a viscoelastic fluid…
Chaotic mixing in a planar, curved channel using periodic slip
P. Garg, J. R. Picardo, S. Pushpavanam
We propose a novel strategy for designing chaotic micromixers using curved channels confined between two flat planes. The location of the separatrix between the Dean vortices, indu…