5 papers
Global Non-Axisymmetric Hall Instabilities in a Rotating Plasma
Alexandre Sainterme, Fatima Ebrahimi
Non-axisymmetric, flow-driven instabilities in the incompressible Hall-MHD model are studied in a differentially rotating cylindrical plasma. It is found that in the Hall-MHD regim…
Understanding large-scale dynamos in unstratified rotating shear flows
Tushar Mondal, Pallavi Bhat, Fatima Ebrahimi +1
We combine simulations with new analyses that overcome previous pitfalls to explicate how nonhelical mean-field dynamos grow and saturate in unstratified, magnetorotationally drive…
Non-ideal stability analysis of differentially rotating plasmas with global curvature effects
Alexander Haywood, Fatima Ebrahimi
The linear stability of global non-axisymmetric modes in differentially rotating, magnetized, non-ideal plasma is crucial for understanding turbulence and transport phenomena. We i…
A generalized effective potential for differentially rotating plasmas
Fatima Ebrahimi, Alexander Haywood
Global stability of differentially rotating plasma is investigated using a generalized effective potential. We first, for a current-free system, obtain a general form of an effecti…
Observation of nonaxisymmetric standard magnetorotational instability induced by a free-shear layer
Yin Wang, Fatima Ebrahimi, Hongke Lu +3
The standard magnetorotational instability (SMRI) is widely believed to be responsible for the observed accretion rates in astronomical disks. It is a linear instability triggered…