How reliable are MRI simulations? The role of the magnetic Prandtl number

Update: 2009-10-09

Description

Thanks to high resolution local simulations, the last few years have seen significant progresses in our understanding of MHD turbulence driven by the magnetorotational instability. Small scale explicit dissipation coefficients (viscosity and resistivity), traditionnally excluded from such simulations in the past, have been shown to be extremely important to set the saturated amplitude of the turbulence. In this talk I will review these recent results and discuss their consequences for protoplanetary disks structure and planet formation theories.

Comments

In Channel

Open problems in terrestrial planet formation

2009-12-1401:09:33

Determining the internal structure of extrasolar planets, and the phenomenon of retrograde planetary orbits

2009-12-0154:55

Stability and perturbation theory of Hamiltonian systems

2009-11-2601:20:07

Do we need a rapid dispersal mechanism for protoplanetary discs?

2009-11-2601:04:16

Chaotic star formation and the alignment of stellar rotation with disc and planetary orbital axes

2009-11-1101:05:19

Planets in binaries

2009-11-1101:01:14

Formation of close-in terrestrial planets: inner disk boundary, disk-planet interactions and giant impacts

2009-11-1101:06:05

Garvoturbulent planetesimal formation - state and prospects of the field

2009-10-0958:49

Triggering gravitational collapse into planetesimals: The streaming instability and other mechanisms

2009-10-0901:03:32

Magnetic activity and the separation of dust from gas

2009-10-0949:58

Prandtl number dependence of MRI-driven transport : new results and future prospects

2009-10-0931:39

How reliable are MRI simulations? The role of the magnetic Prandtl number

2009-10-0901:01:00

Magnetic activity in protoplanetary discs

2009-10-0931:38

Planetesimal formation in self-gravitating protostellar discs

2009-10-0958:15

Primary accretion of large planetesimals from chondrule size particles

2009-10-0901:03:00

On the validity of the super-particle approximation of planetesimals in simulations of gravitational collapse

2009-10-0926:33

Asteroids formed big

2009-10-0936:24

The growth of macroscopic bodies in protoplanetary disks: experimental evidences

2009-10-0901:02:07

Planetesimal formation: numerical modeling of particle growth, settling, and collective gas-grain interactions

2009-10-0901:02:42

Models of partially ionized discs

2009-10-0901:00:11

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How reliable are MRI simulations? The role of the magnetic Prandtl number

#box-pro-ellipsis-176118492046812{-webkit-line-clamp:2;}How reliable are MRI simulations? The role of the magnetic Prandtl number

How reliable are MRI simulations? The role of the magnetic Prandtl number

Steve Greenham

How reliable are MRI simulations? The role of the magnetic Prandtl number