Results 21 to 30 of about 36,417 (233)
SPROUT: A Moving-mesh Hydro Code Using a Uniformly Expanding Cartesian Grid
The Astrophysical Journal Supplement Series, 2023 We present the publicly available moving-mesh hydrodynamics code Sprout . Sprout solves the equations of ideal hydrodynamics on an expanding Cartesian mesh.
Soham Mandal, Paul C. Duffell
doaj +1 more source
Conserving Local Magnetic Helicity in Numerical Simulations
The Astrophysical Journal, 2023 Magnetic helicity is robustly conserved in systems with very large magnetic Reynolds numbers, including most systems of astrophysical interest, and unlike kinetic and magnetic energy, it is not dissipated at small scales.
Yossef Zenati, Ethan T. Vishniac
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On a Raychaudhuri equation for hot gravitating fluids [PDF]
, 2006 We generalize the Raychaudhuri equation for the evolution of a self gravitating fluid to include an Abelian and non-Abelian hybrid magneto fluid at a finite temperature.
A. K. Raychaudhuri +7 more
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Magnetohydrodynamical Torsional Oscillations from Thermoresistive Instability in Hot Jupiters
The Astrophysical Journal, 2023 Hot Jupiter atmospheres may be subject to a thermoresistive instability where an increase in the electrical conductivity due to ohmic heating results in runaway of the atmospheric temperature.
Raphaël Hardy +2 more
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Turbulence in Particle-laden Midplane Layers of Planet-forming Disks
The Astrophysical Journal, 2023 We examine the settled particle layers of planet-forming disks in which the streaming instability (SI) is thought to be either weak or inactive. A suite of low-to-moderate-resolution 3D simulations in a 0.2 H -sized box, where H is the pressure scale ...
Debanjan Sengupta, Orkan M. Umurhan
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Role of helicities for the dynamics of turbulent magnetic fields [PDF]
, 2012 Investigations of the inverse cascade of magnetic helicity are conducted with pseudospectral, three-dimensional direct numerical simulations of forced and decaying incompressible magnetohydrodynamic turbulence. The high-resolution simulations which allow
Malapaka, Shiva Kumar. +1 more
core +2 more sources
Weakly non-Boussinesq convection in a gaseous spherical shell [PDF]
, 2017 We examine the dynamics associated with weakly compressible convection in a spherical shell by running 3D direct numerical simulations using the Boussinesq formalism [1].
Brummell, Nicholas +2 more
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Nonlinearity in a dynamo [PDF]
, 2009 Using a rotating flat layer heated from below as an example, we consider effects which lead to stabilizing an exponentially growing magnetic field in magnetostrophic convection in transition from the kinematic dynamo to the full non-linear dynamo.
Cattaneo F +9 more
core +1 more source
Instabilities in a staircase stratified shear flow [PDF]
, 2018 We study stratified shear flow instability where the density profile takes the form of a staircase of interfaces separating uniform layers. Internal gravity waves riding on density interfaces can resonantly interact due to a background shear flow ...
G. Ponetti +5 more
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Connecting astrophysics to laboratory fluid dynamics - Astrophysical thermonuclear flashes
30th Fluid Dynamics Conference, 1999 We discuss the strategy followed by the Center for Astrophysical Thermonuclear Flashes in validating codes designed for thermonuclear burning on the surfaces or the interior of evolved compact stars. As an illustration, we discuss in some detail our progress in simulating Rayleigh-Taylor mixing relevant to Type la supernovae. © 1999 by The Univ.
Rosner, R. +8 more
openaire +2 more sources