April 15-17

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approvedsherwood_19.pdf2019-04-18 08:55:16James Juno

Abstracts

Author: James L. Juno
Requested Type: Poster
Submitted: 2019-02-21 06:25:34

Co-authors: A. Hakim, J. TenBarge, W. Dorland

Contact Info:
University of Maryland College Park
410 S 10th Ave, L3
Highland Park, NJ   08904
United States

Abstract Text:
In this presentation, we step back from the grander challenge of elucidating the entire dynamics and thermodynamics of a magnetized, weakly collisional plasma and instead focus on a simple system where the solution of how dissipation occurs has an analytic result in certain limits. Our goal is to 1) demonstrate that said analytic result does indeed hold upon simulation, and 2) extend the result marginally beyond the analytic solution with the use of simulations. In particular, we consider a driven Vlasov system of Langmuir turbulence. With the use of the Gkeyll framework, which contains both a Vlasov-Maxwell solver as well as a simplified Fokker-Planck operator, the Lenard-Bernstein operator, for self-collisions, we can model the fully driven system with both energy injection via the fields, and energy dissipation via the collision operator. The inclusion of the collision operator is in fact key for not just a philosophical, but also a physical understanding of the processes at play, as a collision operator allows one to balance the power input and dissipated to form a phase space cascade in real and velocity space.

Comments:
Can we put all the posters by the Gkeyll team together? This would be posters by:
James (Jimmy) Juno
Noah Mandell
Tess Bernard
Manaure Francisquez
Jason TenBarge
Ammar Hakim
Greg Hammett