50 citations · 202 across the 16 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…
Kolmogorov Turbulence Coexists with Pseudo-Turbulence in Buoyancy-Driven Bubbly Flows
Vikash Pandey, Dhrubaditya Mitra, Prasad Perlekar
We investigate spectral properties of buoyancy driven bubbly flows. Using high-resolution numerical simulations and phenomenology of homogeneous turbulence, we identify the relevan…
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…
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…
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,…
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…
Asymmetricity and sign reversal of secondary Bjerknes force from strong nonlinear coupling in cavitation bubble pairs
Vikash Pandey
Most of the current applications of acoustic cavitation use bubble clusters that exhibit multibubble dynamics. This necessitates a complete understanding of the mutual nonlinear co…
Pseudo-turbulence in two-dimensional buoyancy driven bubbly flows: a DNS study
Rashmi Ramadugu, Vikash Pandey, Prasad Perlekar
We present a direct numerical simulation (DNS) study of buoyancy driven bubbly flows in two-dimensions. We employ volume of fluid (VOF) method to track the bubble interface. To inv…