PPPS 2019

Session

1.2 Computational Plasma Physics III

O6A

26 Jun 2019, 15:30

DoubleTree at the Entrance to Universal Orlando

Conveners

1.2 Computational Plasma Physics III

• Christine Roark

1164. A Kernel Based High Order ''Explicit'' Unconditionally Stable Constrained Transport Method for Ideal Magnetohydrodynamics

FIRAT CAKIR (MICHIGAN STATE UNIVERSITY)

26/06/2019, 15:45

1.2 Computational Plasma Physics;

Either

The ideal Magnetohydrodynamics (MHD) equations are challenging because one needs to maintain the divergence free condition, divB=0. Many numerical methods have been developed to enforce this condition. In this work, we further our work on mesh aligned constraint transport by developing a new Kernel based approach for the vector potential in 2D and 3D. The approach for solving the vector...

1093. Convergence Ratio Effects on Ultra-thin Foil Liner Implosion and Explosion Stability

Jeff Woolstrum (University of Michigan)

26/06/2019, 16:00

1.2 Computational Plasma Physics;

Oral

Ultrathin foil liners, with thicknesses on the order of 400 nm, are used in university-scale Z-pinch experiments (~1 MA) to study physics relevant to inertial confinement fusion efforts on larger-scale facilities (e.g. the MagLIF efforts on the 25 MA Z facility at Sandia National Laboratories). In university-scale experiments, these ultrathin foils have required a central support rod to...

648. Multi-Species Plasma-Electromagnetic Models for Pulsed Power Applications

Kris Beckwith (Sandia National Laboratories)

26/06/2019, 16:15

1.2 Computational Plasma Physics;

Oral

Many problems of interest in plasma modeling are subject to the `tyranny of scales', specifically, problems that encompass physical processes that operate on timescales that are separated by many orders of magnitude. At the lowest frequency the plasma is in the regime of magnetohydrodynamics and has been the focus of extensive research in fluid plasma modeling in the past few decades. At...

615. Using Coupled Dust Motion to Analyze Plasma-Dust Interactions

Dr Lorin Matthews (Baylor University)

26/06/2019, 16:45

1.5 Dusty Plasmas and Strongly Coupled Plasmas

Oral

Electric fields within a plasma cause positive ions to have a directed flow. The trajectories of the flowing ions are deflected by negatively charged dust grains immersed in the plasma, resulting in an ion wakefield downstream from the dust particles. The positive space-charge region not only modifies the interaction between the charged grains but also contributes to the stability of ordered...

523. Statistics and Propagation Modeling of Atmospheric Lightning

William Brooks (Texas Tech University)

26/06/2019, 17:00

1.5 Dusty Plasmas and Strongly Coupled Plasmas

Oral

A stochastic model of stepped leader propagation in downward negative lightning with inclusion of final jump process was developed. Results of stochastic gas diffusion are used to determine propagation. The model allows for large volumes of simulated lightning strikes to be evaluated quickly in the presence of complex geometries such as buildings. It enables Monte Carlo methods of arriving at...

583. Numerical model of acoustic wave generated by free-burning AC arc

Chen Zhe (Tsinghua University)

26/06/2019, 17:15

1.2 Computational Plasma Physics;

Oral

Free-burning AC arc is wildly used in arc welding, arc oven and occurs in the arcing fault of the power system. The acoustic wave will be generated in the process of AC arc burning in the air due to the periodic injection and release of the electric energy. This phenomenon is used in monitoring the quality of arc welding and pressure wave protection of substation. In this article, we made a...