5 papers · 1 filter
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,…
Statistics of relative velocity for particles settling under gravity in a turbulent flow
Akshay Bhatnagar
We study the joint probability distributions of separation, , and radial component of the relative velocity, , of particles settling under gravity in a turbulent flow…
The spreading of viruses by airborne aerosols: lessons from a first-passage-time problem for tracers in turbulent flows
Akhilesh Kumar Verma, Akshay Bhatnagar, Dhrubaditya Mitra +1
We study the spreading of viruses, such as SARS-CoV-2, by airborne aerosols, via a new first-passage-time problem for Lagrangian tracers that are advected by a turbulent flow: By d…
Lagrangian Irreversibility and Eulerian Dissipation in Fully-Developed Turbulence
Jason R. Picardo, Akshay Bhatnagar, Samriddhi Sankar Ray
We revisit the issue of Lagrangian irreversibility in the context of recent results [Xu, et al., PNAS, 111, 7558 (2014)] on flight-crash events in turbulent flows and show how extr…
Relative velocities in bi-disperse turbulent aerosols: simulations and theory
Akshay Bhatnagar, K. Gustavsson, B. Mehlig +1
We perform direct numerical simulations of a bi-disperse suspension of heavy spherical particles in forced, homogeneous, and isotropic three-dimensional turbulence. We compute the…