Results 31 to 40 of about 258,357 (262)
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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Planetesimal Initial Mass Functions Following Diffusion-regulated Gravitational Collapse
The Astrophysical Journal, 2023 The initial mass function (IMF) of planetesimals is of key importance for understanding the initial stages of planet formation, yet theoretical predictions so far have been insufficient in explaining the variety of IMFs found in simulations.
Konstantin Gerbig, Rixin Li
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The Astrophysical Journal, 2023 Due to the prevalence of magnetic fields in astrophysical environments, magnetohydrodynamic (MHD) simulation has become a basic tool for studying astrophysical fluid dynamics.
Jeongbhin Seo, Dongsu Ryu
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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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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
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Asymptotic Solutions for Mean-Field Slab Dynamos [PDF]
, 2014 We discuss asymptotic solutions of the kinematic $\alpha\omega$-dynamo in a thin disc (slab). Focusing upon the strong dynamo regime, in which the dynamo number $D$ satisfies $|D|\gg1$, we resolve uncertainties in the earlier treatments and conclude that
Bushby, Paul +3 more
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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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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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