A self-consistent two-temperature model for the computation of supersonic argon plasma jets

Abstract

This paper presents a two-temperature model for compressible plasma flows. This study concentrates on the behaviour of the plasma jet in the expansion region. The conditions used correspond to the conditions of low-pressure plasma spraying, with slightly supersonic conditions with thermal and chemical non-equilibrium. The flow dynamics results are analysed with different turbulence models and appear to be consistent with results previously published by the authors [3] on the dynamics of low-temperature air jets and favour the Reynolds stress turbulence model. Chemical as well as thermal non-equilibrium are studied.

Two-temperature transport coefficients in argon–helium thermal plasmas

“…For low energies (from 0.01 to 0.1 eV), the cross sections Q (1) are extrapolated using data from [14]. At 0.01 eV, the cross sections Q (2) and Q (3) are calculated assuming that only the first phase shift η 0 of the elastic collision differential collision cross section does not vanish. This assumption is only valid for weak collision energies and for short range interaction potentials.…”

“…The modelling of plasma processes requires two-temperature transport coefficients in order to solve with accuracy the conservation equations with their boundary conditions (see, e.g. recently [1][2][3]). Very recently, Rat et al [4,5] proposed a modified approach of the Chapman-Enskog method applied to a two-temperature thermal plasma in order to calculate the non-equilibrium transport coefficients.…”

Two-temperature chemically non-equilibrium modelling of high-power Ar–N2inductively coupled plasmas at atmospheric pressure

“…Such two-temperature conditions can also affect distributions of radicals and excited particles. Some two-temperature models for a pure Ar plasma near thermal equilibrium condition, including the ICP, have been developed [22][23][24]. Also, Gonzalez et al [25,26] developed thermal and chemical non-equilibrium models for SF 6 circuit breaker arcs.…”

Non-uniqueness of the multi-temperature law of mass action. Application to 2T plasma composition calculation by means of a collisional-radiative model

“…There are more and more publications in the literature dealing with multi-T fluid models such as the works of Mostaghimi et al [2], El Morsli and Proulx [3], Tanaka [4], Ye et al [5] and Al-Mamun et al [6] concerning respectively argon, air, Ar-N 2 , Ar-H 2 and Ar-CO 2 -H 2 radio-frequency inductively coupled plasma (ICP) torches, Ghorui et al [7] for the study of the oxygen flow inside the nozzle of a metal cutting device, Boselli et al [8] concerning a direct current (DC) welding arc in argon, Trelles et al [9], Bartosiewicz at al. [10] and Kaminska et al [11] for the study of a DC plasma torch in argon, Baeva and Uhrlandt [12] and Freton et al [13] concerning free-burning arcs in argon, Colombo et al [14] for a 3D transient model of a twin torch system, Park et al [15] for a DC transferred arc in argon and Benilov and Naidis [16] for the study of a wall-stabilized DC arc discharge.…”