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8 papers · 2 filters
Accelerated evolution of convective simulations
Evan H. Anders, Benjamin P. Brown, Jeffrey S. Oishi
High Peclet number, turbulent convection is a classic system with a large timescale separation between flow speeds and the thermal relaxation time. In this paper, we present a meth…
The timestep constraint in solving the gravitational wave equations sourced by hydromagnetic turbulence
A. Roper Pol, A. Brandenburg, T. Kahniashvili +2
Hydromagnetic turbulence produced during phase transitions in the early universe can be a powerful source of stochastic gravitational waves (GWs). GWs can be modelled by the linear…
Helicity dynamics, inverse and bi-directional cascades in fluid and MHD turbulence: A brief review
A. Pouquet, D. Rosenberg, J. E. Stawarz +1
We briefly review helicity dynamics, inverse and bi-directional cascades in fluid and magnetohydrodynamic (MHD) turbulence, with an emphasis on the latter. The energy of a turbulen…
Varying the forcing scale in low Prandtl number dynamos
A. Brandenburg, N. E. L. Haugen, Xiang-Yu Li +1
Small-scale dynamos are expected to operate in all astrophysical fluids that are turbulent and electrically conducting, for example the interstellar medium, stellar interiors, and…
Vertical drafts and mixing in stratified turbulence: sharp transition with Froude number
F. Feraco, R. Marino, A. Pumir +4
We investigate the large-scale intermittency of vertical velocity and temperature, and the mixing properties of stably stratified turbulent flows using both Lagrangian and Eulerian…
Energetics of turbulence generated by chiral MHD dynamos
Jennifer Schober, Axel Brandenburg, Igor Rogachevskii +1
An asymmetry in the number density of left- and right-handed fermions is known to give rise to a new term in the induction equation that can result in a dynamo instability. At high…