Abstract Details
Abstracts
Author: Patrick A. Grate
Requested Type: Poster
Submitted: 2025-03-14 17:40:03
Co-authors: advised by Dr. F. Ebrahimi
Contact Info:
Princeton University
6432 Frist Campus Center
Princeton, NJ 08544
US
Abstract Text:
"Within accretion disks, Magneto-rotational instability (MRI) is believed to contribute to the rates of angular momentum transport that is observed in these settings. It has already been simulated that non-axisymmetric perturbations do form as a result of magnetic fields interacting with the differentially rotating plasma in these disks [1]. However, there has been no further study on the onset of reconnection sites in the nonlinear non-axisymmetric case or for curvature modes, which come from the spatial curvature of the disk [1].This study investigates where these sites occur, and if these sites are viable candidates for momentum transport. The implications of this research also extend towards laboratory plasma, which further motivates the research towards understanding the angular momentum transportation in accretion disks. This study takes an introductory perspective and seeks to research the evolution of current sheets in accretion flows undergoing MRI in non-linear, non-axisymmetric cases by simulating a global domain with curvature terms to see the possibilities of reconnection. We simulate these global domains using the Non-Ideal Magnetohydrodynamics with Rotation, an Open Discussion project (NIMROD) Code [2], as used in [1] and the post-processing is then performed using VisIt [3] to analyze the evolution of NIMROD's plasma simulation." This work is supported by NSF.
[1] Fatima Ebrahimi and Matthew Pharr. A Nonlocal Magneto-curvature Instability in a Differentially Rotating Disk. 2022.
[2] C. R. Sovinec, A. H. Glasser, et al. and Nimrod Team. Nonlinear magnetohydrodynamics simulation using high-order finite elements.
Journal of Computational Physics, 2004.
[3] E. Wes Bethel, Hank Childs, and Charle Hanson, et al. High Performance Visualization: Enabling Extreme-Scale Scientific Insight, October 2012.
Characterization: 1.0
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