162 citations · 408 across the 6 of their papers we have counts for
8 papers · 1 filter
Viscous, Resistive Magnetorotational Modes
Martin E. Pessah, Chi-kwan Chan
We carry out a comprehensive analysis of the behavior of the magnetorotational instability (MRI) in viscous, resistive plasmas. We find exact, non-linear solutions of the non-ideal…
Angular Momentum Transport in Accretion Disks: Scaling Laws in MRI-driven Turbulence
Martin E. Pessah, Chi-kwan Chan, Dimitrios Psaltis
We present a scaling law that predicts the values of the stresses obtained in numerical simulations of saturated MRI-driven turbulence in non-stratified shearing boxes. It relates…
Spectral Methods for Time-Dependent Studies of Accretion Flows. III. Three-Dimensional, Self-gravitating, Magnetohydrodynamic Disks
Chi-kwan Chan, Dimitrios Psaltis, Feryal Ozel
Accretion disks are three-dimensional, turbulent, often self-gravitating, magnetohydrodynamic flows, which can be modeled in detail with numerical simulations. In this paper, we pr…
The fundamental difference between shear alpha viscosity and turbulent magnetorotational stresses
Martin E. Pessah, Chi-kwan Chan, Dimitrios Psaltis
Numerical simulations of turbulent, magnetized, differentially rotating flows driven by the magnetorotational instability are often used to calculate the effective values of alpha…
A Local Model for Angular Momentum Transport in Accretion Disks Driven by the Magnetorotational Instability
Martin E. Pessah, Chi-kwan Chan, Dimitrios Psaltis
We develop a local model for the exponential growth and saturation of the Reynolds and Maxwell stresses in turbulent flows driven by the magnetorotational instability. We first der…
The signature of the magnetorotational instability in the Reynolds and Maxwell stress tensors in accretion discs
Martin E. Pessah, Chi-kwan Chan, Dimitrios Psaltis
The magnetorotational instability is thought to be responsible for the generation of magnetohydrodynamic turbulence that leads to enhanced outward angular momentum transport in acc…