124 citations · 1.5k across the 64 of their papers we have counts for
7 papers · 1 filter
Large is different: non-monotonic behaviour of elastic range scaling in polymeric turbulence at large Reynolds and Deborah numbers
Marco E Rosti, Prasad Perlekar, Dhrubaditya Mitra
We use direct numerical simulations to study homogeneous, and isotropic turbulent flows of dilute polymer solutions at high Reynolds and Deborah numbers. We find that for small wav…
Rate of formation of caustics in heavy particles advected by turbulence
Akshay Bhatnagar, Vikash Pandey, Prasad Perlekar +1
The rate of collision and the relative velocities of the colliding particles in turbulent flows is a crucial part of several natural phenomena, e.g., rain formation in warm clouds…
Coagulation drives turbulence in binary fluid mixtures
Akshay Bhatnagar, Prasad Perlekar, Dhrubaditya Mitra
We use direct numerical simulations and scaling arguments to study coarsening in binary fluid mixtures with a conserved order parameter in the droplet-spinodal regime -- the volume…
Phase ordering, topological defects, and turbulence in the 3D incompressible Toner-Tu equation
Navdeep Rana, Prasad Perlekar
We investigate phase ordering dynamics of the incompressible Toner-Tu equation in three dimensions. We show that the phase ordering proceeds via defect merger events and the dynami…
Turbulence modulation in buoyancy-driven bubbly flows
Vikash Pandey, Dhrubaditya Mitra, Prasad Perlekar
We present a Direct Numerical Simulation (DNS) study of buoyancy-driven bubbly flows in the presence of large scale driving that generates turbulence. On increasing the turbulence…
Ephemeral Antibubbles: Spatiotemporal Evolution from Direct Numerical Simulations
Nairita Pal, Rashmi Ramadugu, Prasad Perlekar +1
Antibubbles, which consist of a shell of a low-density fluid inside a high-density fluid, have several promising applications. We show, via extensive direct numerical simulations (…
Surface tension as the destabiliser of a vortical interface
Rashmi Ramadugu, Prasad Perlekar, Rama Govindarajan
We study the dynamics of an initially flat interface between two immiscible fluids, with a vortex situated on it. We show how surface tension causes vorticity generation at a gener…