Plasma-kg

consistsOf

• electrons 
• ions 
• positive ions 
• synthetic air  Medium

diagnosedUsing

• Finite element method  Method
• Fluid-Poisson Model  Diagnostic Method
• benchmarking  Method
• finite volume method  Method

hasDescription

• Configuration for positive streamer: atmospheric-pressure air, gas temperature of 300 K, two electrodes set 1.25 cm apart with a radius of 1.25 cm, constant voltage of -18.75 kV applied at the powered electrode, additional Gaussian seed of ions introduced near the anode 
• Test case 1: positive streamers in dry air at 1 bar and 300 K, simulated between planar electrodes in a square domain with a radius and height of 1.25 cm, background electric field of 15 kV/cm, Gaussian distribution of positive ions is placed below the anode, constant initial background density of electrons and Ions of 10¹³ m⁻³, no photoionization 

hasProperty

• 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. 

involvedIn

• Comparison of six simulation codes for positive streamers in air  Plasma Study
• Introduction and verification of FEDM, an open-source FEniCS-based discharge modelling code  Plasma Study

partOf

• streamer discharge  Plasma