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Centrum Wiskunde & Informatica (CWI) is the national research institute for mathematics and computer science in the Netherlands. CWI is part of NWO-I, the Institutes Organisation of NWO.

Nature and technology are full of dynamics, often involving multiple scales in length, time and energy. To model these processes, the Multiscale Dynamics Group at CWI combines scientific computing with model reduction and machine learning, with particular focus on plasma dynamics in lightning and space weather, and in high voltage and plasma technology.

Cite Dataset

Comparison of six simulation codes for positive streamers in air

The dataset includes all the input and output files for the paper: Comparison of six simulation codes for positive streamers in air (https://doi.org/10.1088/1361-6595/aad768). Three test cases for axisymmetric positive streamers are described in the paper. The codes are of the finite volume or the finite element type, and they use both explicit and implicit time stepping. The computational domain and initial conditions are kept simple, so other codes can be compared relatively easily to the data published here. This dataset includes all the output files (results) for each group and for each case study. The format of the files are .txt or .dat.

FieldValue
Group
Authors
Release Date
2019-09-05
Identifier
f5b5445e-e97d-4948-a089-56cbfd91878c
Permanent Identifier (DOI)
Permanent Identifier (URI)
Is supplementing
Plasma Source Name
Plasma Source Specification
Plasma Source Properties

Three test cases for positive streamers in dry air at 1 bar and 300 K. Discharges are simulated between planar electrodes in a square domain with a radius and height of 1.25 cm. A background electric field of 15 kV/cm is present, which is well below the breakdown value. To locally enhance the electric field to values above the breakdown threshold, a Gaussian distribution of positive ions is placed below the anode. First test case: constant initial background density of electrons and Ions of 10¹³ m⁻³, no photoionization; second test case: constant initial background density of electrons and ions of 10⁹ m⁻³, no photoionization; third test case: constant initial background density of electrons and ions of 10⁹ m⁻³, photoionization included.

Plasma Medium Name
Plasma Medium Properties
Gas temperature: 300 K; Pressure: 1 bar.
Plasma Diagnostics Name
Plasma Diagnostics Properties

Six different codes based on the finite volume method and finite element method, respectively, are used to solve the fluid equations. Some groups use adaptive mesh refinement while others use a fixed numerical grid. See B. Bagheri et al. (https://doi.org/10.1088/1361-6595/aad768) for details on the different codes and numerical parameters.

Language
English
License
Public Access Level
Public
Contact Name
Ebert, Ute
Contact Email

Data and Resources