Simulating streamer discharges in 3D with the parallel adaptive Afivo framework

被引:105
作者
Teunissen, Jannis [1 ]
Ebert, Ute [2 ,3 ]
机构
[1] Katholieke Univ Leuven, Dept Math, Ctr Math Plasma Astrophys, Celestijnenlaan 200B, B-3001 Leuven, Belgium
[2] CWI, POB 94079, NL-1090 GB Amsterdam, Netherlands
[3] Eindhoven Univ Technol, Dept Appl Phys, POB 513, NL-5600 MB Eindhoven, Netherlands
关键词
streamer discharge; 3D simulation; adaptive mesh refinement; streamer interaction; streamer branching; plasma fluid model; geometric multigrid; FINITE-ELEMENT; NUMERICAL-SIMULATION; ELECTRON-TRANSPORT; PROPAGATION; PHOTOIONIZATION; ALGORITHM; SPRITES; AIR; N-2;
D O I
10.1088/1361-6463/aa8faf
中图分类号
O59 [应用物理学];
学科分类号
摘要
We present an open-source plasma fluid code for 2D, cylindrical and 3D simulations of streamer discharges. The code is based on the Afivo framework, which features adaptive mesh refinement on quadtree/octree grids, geometric multigrid methods for Poisson's equation, and OpenMP parallelism. We describe the numerical implementation of a fluid model of the drift-diffusion-reaction type, combined with the local field approximation. Then we demonstrate its functionality with 3D simulations of long positive streamers in nitrogen in undervolted gaps. Three examples are presented. The first one shows how a stochastic background density affects streamer propagation and branching. The second one focuses on the interaction of a streamer with preionized regions, and the third one investigates the interaction between two streamers. The simulations use up to 108 grid cells and run in less than a day; without mesh refinement they would require more than 1012 grid cells.
引用
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页数:13
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