Browsing SINTEF Open by Author "Marskar, Robert"
Now showing items 1-11 of 11
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3D fluid modeling of positive streamer discharges in air with stochastic photoionization
Marskar, Robert (Peer reviewed; Journal article, 2020)Streamer discharges are thin plasma channels that precede lightning and sparks. They usually evolve in bundles as stochastic tree-like structures and are inherently difficult to model due to their multiscale nature. In ... -
A 3D kinetic Monte Carlo study of streamer discharges in CO2
Marskar, Robert (Peer reviewed; Journal article, 2024)We theoretically study the inception and propagation of positive and negative streamers in CO2. Our study is done in 3D, using a newly formulated kinetic Monte Carlo discharge model where the electrons are described as ... -
An adaptive Cartesian embedded boundary approach for fluid simulations of two- and three-dimensional low temperature plasma filaments in complex geometries
Marskar, Robert (Peer reviewed; Journal article, 2019)We review a scalable two- and three-dimensional computer code for low-temperature plasma simulations in multi-material complex geometries. Our approach is based on embedded boundary (EB) finite volume discretizations of ... -
Adaptive multiscale methods for 3D streamer discharges in air
Marskar, Robert (Peer reviewed; Journal article, 2019)We discuss spatially and temporally adaptive implicit-explicit (IMEX) methods for parallel simulations of three-dimensional fluid streamer discharges in atmospheric air. We examine strategies for advancing the fluid equations ... -
chombo-discharge: An AMR code for gas discharge simulations in complex geometries
Marskar, Robert (Peer reviewed; Journal article, 2023) -
Genesis of column sprites: Formation mechanisms and optical structures
Marskar, Robert (Peer reviewed; Journal article, 2024)Sprite discharges are electrical discharges that initiate from the lower ionosphere during intense lightning storms, manifesting themselves optically as flashes of light that last a few milliseconds. This study unravels ... -
A kinetic Monte Carlo study of positive streamer interaction with complex dielectric surfaces
Marskar, Robert; Meyer, Hans Kristian Hygen (Peer reviewed; Journal article, 2023)We present a computational study of positive streamers in air propagating over dielectric plates with square channels running orthogonal to the propagation direction. The study uses a newly developed non-kinetic Particle-In-Cell ... -
Stochastic and self-consistent 3D modeling of streamer discharge trees with Kinetic Monte Carlo
Marskar, Robert (Peer reviewed; Journal article, 2024)This paper contains the foundation for a new Particle-In-Cell model for gas discharges, based on Îto diffusion and Kinetic Monte Carlo (KMC). In the new model the electrons are described with a microscopic drift-diffusion ... -
Streamer propagation along a profiled dielectric surface
Meyer, Hans Kristian Hygen; Marskar, Robert; Gjemdal, Henrik; Mauseth, Frank (Peer reviewed; Journal article, 2020)We investigate the propagation of positive streamers along a profiled dielectric surface in air at atmospheric pressure. Results from experiments and two-dimensional planar low-temperature plasma fluid simulations are ... -
Streamer Propagation along Profiled Insulator Surfaces under Positive Impulse Voltages
Meyer, Hans Kristian Hygen; Marskar, Robert; Bilsbak, Henriette Graverholt; Mauseth, Frank; Schueller, Michael (Peer reviewed; Journal article, 2022)Controlling discharge growth on insulator surfaces is important in high voltage gaseous insulation systems. In this study, the effect of small-scale surface profiles on streamer discharge propagation is examined experimentally. ... -
What Determines the Parameters of a Propagating Streamer: A Comparison of Outputs of the Streamer Parameter Model and of Hydrodynamic Simulations
Lehtinen, Nikolai Grigorievich; Marskar, Robert (Peer reviewed; Journal article, 2021)Electric streamer discharges (streamers) in the air are a very important stage of lightning, taking place before formation of the leader discharge, and with which an electric discharge starts from conducting objects which ...