Bulletin of the American Physical Society
64th Annual Meeting of the APS Division of Plasma Physics
Volume 67, Number 15
Monday–Friday, October 17–21, 2022; Spokane, Washington
Session NP11: Poster Session V: In-Person, Hall A (9:30-11:00am) and Virtual Poster Presentations (11:15am-12:30pm)
MFE: Stellerators
HED: High Energy Density
BEAMS: Short Pulse Laser Plasmas
HED: Short Pulse Laser Plasma
SPACE: Space Plasmas
9:30 AM - 12:30 PM
Wednesday, October 19, 2022
Room: Exhibit Hall A and Online
Abstract: NP11.00143 : Enabling Optimizations for Global Magnetospheric Kinetic Simulations with Reduced Kinetic Spectral Models
Presenter:
Oleksandr Koshkarov
(Los Alamos National Laboratory)
Authors:
Oleksandr Koshkarov
(Los Alamos National Laboratory)
Gian Luca Delzanno
(Los Alamos National Laboratory)
Vadim S Roytershteyn
(Space Science Institute)
Cecilia Pagliantini
(Ecole Polytechnique Federale de Lausanne, Lausanne, Switzerland)
In this presentation, we describe a novel simulation method, where the kinetic equation is solved using a spectral expansion of the plasma distribution function. The low-order terms in the expansion capture the large-scale dynamics of the system, while higher-order terms add microscopic physics incrementally, similar to classical fluid-moment expansion. Such a method is ideally suited for problems involving fluid-kinetic coupling, since the number of expansion terms could be adapted in space and time. Furthermore, the spectral basis itself adaptively changes in space and time, adjusting to plasma mean flow and temperature, thus making the representation of the particle distribution function very efficient. We show that our reduced kinetic model with just a ~(4-6)^3 velocity-space moments agrees well with results from fully-kinetic simulations on some examples. In addition to describing the method, we will present several examples illustrating its application to various problems, including solar wind-magnetosphere interaction.
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700