TWO-DIMENSIONAL FLUID MODELING OF DC GLOW DISCHARGE IN ARGON AT LOW PRESSURE

Abstract

The modeling of DC glow discharge in argon at the pressure and inter-electrode distance was performed for different voltages and glow currents. For the first time, argon glow discharge is modeled using a two dimensional (2D) fluid model with non-local ionization. A detailed numerical procedure for 2D fluid modeling is given. The 2D profiles of particles number densities and electric potential obtained from the fluid model with non-local ionization and the simple fluid model are presented and compared. DVODIMENZIONI FLUIDNI MODEL JEDNOSMERNOG TINJAVOG PRAŽNJENJA U ARGONU NA NISKOM PRITISKU U radu je izvrseno modelovanje jednosmernog tinjavog pražnjenja u argonu na pritisku i medjuelektrodnom rastojanjupri razlicitim vrednostima primenjenih napona i radnih struja tinjavog pražnjenja. Po prvi put je modelovano tinjavo pražnjenje u argonu dvodimenzionim fluidnim modelom sa nelokalnom jonizacijom. U radu je data detaljna procedura za 2D fluidni model. Osim toga, izracunate su i  uporedjene 2D raspodele koncentracija cestica i elektricnog potencijala dobijenih pomocu fluidnog modela sa nelokalnom jonizacijom i  jednostavnog  fluidnog modela. HIGHLIGHTS The modeling of DC glow discharge in argon was performed for different voltages and glow currents; Glow discharge was modeled using the two-dimensional (2D) simple fluid model and the fluid model with non-local ionization; A detailed numerical procedure for 2D fluid modeling is given; 2D profiles of the particle number densities and the electric potential obtained from the fluid model with non-local ionization and the simple fluid model are presented and compared.