50 citations · 71 across the 6 of their papers we have counts for
9 papers · 1 filter
Energy spectra of buoyancy-driven bubbly flow in a vertical Hele-Shaw cell
Rashmi Ramadugu, Vikash Pandey, Prasad Perlekar
We present direct numerical simulations (DNS) study of confined buoyancy-driven bubbly flows in a Hele-Shaw setup. We investigate the spectral properties of the flow and make compa…
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 (…
Paths to caustic formation in turbulent aerosols
Jan Meibohm, Vikash Pandey, Akshay Bhatnagar +4
The dynamics of small, yet heavy, identical particles in turbulence exhibits singularities, called caustics, that lead to large fluctuations in the spatial particle-number density,…
Coarsening in the two-dimensional incompressible Toner-Tu equation: Signatures of turbulence
Navdeep Rana, Prasad Perlekar
We investigate coarsening dynamics in the two-dimensional, incompressible Toner-Tu equation. We show that coarsening proceeds via vortex merger events, and the dynamics crucially d…
Liquid velocity fluctuations and energy spectra in three-dimensional buoyancy driven bubbly flows
Vikash Pandey, Rashmi Ramadugu, Prasad Perlekar
We present a direct numerical simulation (DNS) study of pseudo-turbulence in buoyancy driven bubbly flows for a range of Reynolds ($\Rey$) and Atwood ($\At$) numbers. We study the…
Clustering and energy spectra in two-dimensional dusty gas turbulence
Vikash Pandey, Dhrubaditya Mitra, Prasad Perlekar
We present Direct Numerical Simulation (DNS) of heavy inertial particles (dust) immersed in two-dimensional turbulent flow (gas). The dust are modeled as mono-dispersed heavy parti…