55 citations · 373 across the 22 of their papers we have counts for
8 papers · 1 filter
A non-local magneto-curvature instability in a differentially rotating disk
Fatima Ebrahimi, Matthew Pharr
A global mode is shown to be unstable to non-axisymmetric perturbations in a differentially rotating Keplerian disk containing either vertical or azimuthal magnetic fields. In an u…
Onset of Plasmoid Reconnection during Magnetorotational Instability
Jarrett Rosenberg, Fatima Ebrahimi
The evolution of current sheets in accretion flows undergoing magnetorotational instability (MRI) is examined through two and three dimensional numerical modelling of the resistive…
Evolution of the magnetorotational instability on initially tangled magnetic fields
Pallavi Bhat, Fatima Ebrahimi, Eric G. Blackman +1
The initial magnetic field of previous magnetorotational instability (MRI) simulations has always included a significant system-scale component, even if stochastic. However, it is…
Large scale dynamo action precedes turbulence in shearing box simulations of the magnetorotational instability
Pallavi Bhat, Fatima Ebrahimi, Eric G. Blackman
We study the dynamo generation (exponential growth) of large scale (planar averaged) fields in unstratified shearing box simulations of the magnetorotational instability (MRI). In…
Radially Dependent Large Scale Dynamos in Global Cylindrical Shear Flows and the Local Cartesian Limit
F. Ebrahimi, E. G. Blackman
For cylindrical differentially rotating plasmas, we study large-scale magnetic field generation from finite amplitude non-axisymmetric perturbations by comparing numerical simulati…
Helicity-Flux-Driven Alpha Effect in Laboratory and Astrophysical Plasmas
F. Ebrahimi, A. Bhattacharjee
The constraint imposed by magnetic helicity conservation on the alpha effect is considered for both magnetically and flow dominated self-organizing plasmas. Direct numerical simula…
Momentum transport from current-driven reconnection in astrophysical disks
F. Ebrahimi, S. C. Prager
Current-driven reconnection is investigated as a possible mechanism for angular momentum transport in astrophysical disks. A theoretical and computational study of angular momentum…
Saturation of Magnetorotational Instability through Magnetic Field Generation
F. Ebrahimi, S. C. Prager, D. D. Schnack
The saturation mechanism of Magneto-Rotational Instability (MRI) is examined through analytical quasilinear theory and through nonlinear computation of a single mode in a rotating…