35 citations · 295 across the 24 of their papers we have counts for
24 papers
Turbulent Prandtl number from isotropically forced turbulence
Petri J. Käpylä, Nishant K. Singh
Turbulent motions enhance the diffusion of large-scale flows and temperature gradients. Such diffusion is often parameterized by coefficients of turbulent viscosity () a…
Shell model for stratified convection: implications for the solar convective conundrum
Kishore Gopalakrishnan, Nishant K. Singh
We extend the notion of a shell model to stratified systems, and propose one that represents stratified, nonmagnetic, nonrotating convection at low Mach number. Motivated by profil…
Mean field dynamo action in shearing flows. II: fluctuating kinetic helicity with zero mean
Naveen Jingade, Nishant K. Singh
Here we explore the role of temporal fluctuations in kinetic helicity on the generation of large-scale magnetic fields in presence of a background linear shear flow. Key techniques…
Small-Scale Dynamo in Supernova-Driven Interstellar Turbulence
Frederick A. Gent, Mordecai-Mark Mac Low, Maarit J. Kapyla +1
Magnetic fields grow quickly even at early cosmological times, suggesting the action of a small-scale dynamo (SSD) in the interstellar medium of galaxies. Many studies have focused…
On the existence of shear-current effects in magnetized burgulence
Maarit J. Käpylä, Javier Álvarez Vizoso, Matthias Rheinhardt +2
The possibility of explaining shear flow dynamos by a magnetic shear-current (MSC) effect is examined via numerical simulations. Our primary diagnostics is the determination of the…
Mean field dynamo action in shear flows. I: fixed kinetic helicity
Naveen Jingade, Nishant K. Singh
We study mean-field dynamo action in a background linear shear flow by employing pulsed renewing flows with fixed kinetic helicity and nonzero correlation time (). We use plane…