Thermodynamic and Transport Properties of Two-temperature Oxygen Plasmas

Ghorui, S.; Heberlein, J.; Pfender, E.

doi:10.1007/s11090-007-9053-7

Cited by 43 publications

(18 citation statements)

References 34 publications

(55 reference statements)

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“…Reliability of the obtained results in this paper can be best judged in the light of all these works and comparisons with the previous works, presented in this paper (under LTE conditions). However, as far as practical applications are concerned, it may be mentioned that a recent work [17] determined two temperature properties of oxygen plasmas using similar approaches [61] to find the distributions of plasma temperature and electric potential inside a cutting torch through CFD simulation. When compared, experimental measurements were found to be in excellent agreement with the simulation predictions [17].…”

Section: Discussionmentioning

confidence: 99%

Thermodynamic and Transport Properties of Two-Temperature Nitrogen-Oxygen Plasma

Ghorui

Heberlein

Pfender

2008

Plasma Chem Plasma Process

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Thermodynamic and transport properties are computed for a 17 species model of nitrogen-oxygen plasma under different degrees of thermal non-equilibrium, pressures and volume ratios of component gases. In the computation electron temperatures range from 300 to 45,000 K, mole fractions range from 0.8 to 0.2, pressures range from 0.1 atmosphere to 5 atmospheres, and thermal nonequilibrium parameters (T e /T h ) range from 1 to 20. It is assumed that all the electrons follow a temperature T e and the rest of the species in the plasma follow a temperature T h . Compositions are calculated using the two temperature Saha equation derived by van de Sanden et al. Updated energy level data from National Institute of Standards and Technology (NIST) and recently compiled collision integrals by Capitelli et al., have been used to obtain thermodynamic and transport properties. In the local thermodynamic equilibrium (LTE) regime, the results are compared with published data and an overall good agreement is observed.

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Section: Discussionmentioning

confidence: 99%

Thermodynamic and Transport Properties of Two-Temperature Nitrogen-Oxygen Plasma

Ghorui

Heberlein

Pfender

2008

Plasma Chem Plasma Process

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“…This separation of the specific heat in two distinct contributions for electrons and heavy species is also the approach retained by Ghorui et al [45,46] or Zhang et al [47]. The figure 3 shows the mass density of pure SF 6 obtained from the LMA and CK for the two cases, θ = 5 and 1 bar.…”

Section: Plasma In Nlte And/or Nlce Conditionsmentioning

confidence: 52%

State of Art and Challenges for the Calculation of Radiative and Transport Properties of Thermal Plasmas in HVCB

Cressault

Teulet

Baumann

et al. 2019

PPT

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This paper is focused on the state-of-the-art and challenges concerning the thermophysical properties of thermal plasmas used in numerical modelling devoted to high voltage circuit breakers. <br />For Local Thermodynamic Equilibrium (LTE) and Non-Local Thermodynamic (NLTE) and/or Chemical Equilibrium (NLCE) plasmas, the methods used to calculate the composition, thermodynamic, transport and radiative properties are presented. <br />A review of these last data is proposed and some comparisons are given for illustrations.

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“…The presence of internal degrees of freedom can affect the heat flux vector, and gives rise to an internal thermal conductivity in  , which has been derived using the Hirschfelder-Eucken approximation as follows 43 :…”

Section: A Determination Of Transport Coefficientsmentioning

confidence: 99%

Thermophysical properties of nitrogen plasmas under thermal equilibrium and non-equilibrium conditions

et al. 2011

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Calculated thermophysical properties of nitrogen plasmas in and out of thermal equilibrium are presented. The cutoff of the partition functions due to the lowering of the ionization potential has been taken into account, together with the contributions from different core excited electronic states. The species composition and thermodynamic properties are determined numerically using the Newton-Raphson iterative method, taking into account the corrections due to Coulomb interactions. The transport properties including diffusion coefficient, viscosity, thermal conductivity, and electrical conductivity are calculated using the most recent collision interaction potentials by adopting Devoto's electron and heavy particle decoupling approach, expanded to the third-order approximation (second-order for viscosity) in the framework of Chapman-Enskog method. Results are presented in the pressure range of 0.1 atm to 10 atm and in electron temperature range from 300 to 40 000 K, with the ratio of electron temperature to heavy-particle temperature varied from 1 to 20. Results are compared with those from previous works, and the influences of different definitions of the Debye length are discussed.

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Thermodynamic and Transport Properties of Two-temperature Oxygen Plasmas

Cited by 43 publications

References 34 publications

Thermodynamic and Transport Properties of Two-Temperature Nitrogen-Oxygen Plasma

Thermodynamic and Transport Properties of Two-Temperature Nitrogen-Oxygen Plasma

State of Art and Challenges for the Calculation of Radiative and Transport Properties of Thermal Plasmas in HVCB

Thermophysical properties of nitrogen plasmas under thermal equilibrium and non-equilibrium conditions

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