Multifluid simulations of the Magnetorotational Instability in protostellar disks

Abstract

Turbulent motion driven by the magnetorotational instability (MRI) is believed to provide an anomalous viscosity strong enough to account for observed accretion rates in protostellar accretion disks. In the first of two papers, we perform large-scale, three fluid simulations of a weakly ionised accretion disk and examine the linear and non-linear development of the MRI in the net-flux and zero net-flux cases. This numerical study is carried out using the multifluid MHD code HYDRA. We examine the role of non-ideal effects, including ambipolar diffusion, the Hall effect, and parallel resistivity, on the non-linear evolution of the MRI in weakly ionised protostellar disks in the region where the Hall effect is believed to dominate. We find that angular momentum transport, parametrised by the alpha parameter, is enhanced by inclusion of non-ideal effects in the parameter space of the disk model. The case where the angular momentum and magnetic field are anti-parallel is explored and the Hall effect is shown to have a stabilizing influence on the disk in this case.

arXiv comment11 pages, 15 figures. Accepted to MNRAS 2014 March 25. Received in original form 2013 September 18

References in corpus (32)

• The lesser role of starbursts for star formation at z=2
• Wind-driven Accretion in Protoplanetary Disks. I: Suppression of the Magnetorotational Instability and Launching of the Magnetocentrifugal Wind
• A comparative study of disc-planet interaction
• Enhanced Angular Momentum Transport in Accretion Disks
• Global Structure of Three Distinct Accretion Flows and Outflows around Black Holes through Two-Dimensional Radiation-Magnetohydrodynamic Simulations
• The Effect of Resistivity on the Nonlinear Stage of the Magnetorotational Instability in Accretion Disks
• The conductivity of dense molecular gas
• Effect of Ambipolar Diffusion on the Non-linear Evolution of Magnetorotational Instability in Weakly Ionized Disks
• Trapping Solids at the Inner Edge of the Dead Zone: 3-D Global MHD Simulations
• The Effect of the Hall Term on the Nonlinear Evolution of the Magnetorotational Instability: II. Saturation Level and Critical Magnetic Reynolds Number
• The Effect of the Hall Term on the Nonlinear Evolution of the Magnetorotational Instability: I. Local Axisymmetric Simulations
• Turbulence and angular momentum transport in a global accretion disk simulation
• Magnetic self-organisation in Hall-dominated magnetorotational turbulence
• Testing Convergence for Global Accretion Disks
• Measuring Protoplanetary Disk Accretion with H I Pf-beta
• Hall diffusion and the magnetorotational instability in protoplanetary discs
• Nonlinear Evolution of the Magnetorotational Instability in Ion-Neutral Disks
• Magnetorotational instability in protoplanetary discs
• Global magnetohydrodynamical models of turbulence in protoplanetary disks I. A cylindrical potential on a Cartesian grid and transport of solids
• An explicit scheme for multifluid magnetohydrodynamics
• Magnetorotational instability in stratified, weakly ionised accretion discs
• Orbital Motion of HR 8799 b,c, d using Hubble Space Telescope data from 1998: Constraints on Inclination, Eccentricity and Stability
• A three-dimensional numerical method for modelling weakly ionized plasmas
• Exploring the Galaxy Mass-Metallicity Relation at z~3-5
• Turbulent Diffusion in the Photosphere as Derived from Photospheric Bright Point Motion
• A numerical scheme for multifluid magnetohydrodynamics
• The Inability of Ambipolar Diffusion to set a Characteristic Mass Scale in Molecular Clouds
• Numerical simulations of the type III migration:I. Disc model and convergence tests
• Large Scale Azimuthal Structures Of Turbulence In Accretion Disks - Dynamo triggered variability of accretion
• Global accretion disk simulations of magneto-rotational instability
• Time-Dependent, Multifluid, Magnetohydrodynamic Shock Waves with Grain Dynamics I. Formulation and Numerical Tests
• On The Orbital Evolution of Jupiter Mass Protoplanet Embedded in A Self-Gravity Disk

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