Thermophysical Properties of H2O–Ar Plasmas at Temperatures 400–50,000 K and Pressure 0.1 MPa

• Published in: Plasma chemistry and plasma processing Vol. 28; no. 1; pp. 107 - 122
• Main Author: Krenek, Petr
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01-02-2008
• Subjects: Approximation; Characterization and Evaluation of Materials; Charged particles; Chemistry; Chemistry and Materials Science; Classical Mechanics; Computation; Debye length; Inorganic Chemistry; Mathematical analysis; Mechanical Engineering; Original Paper; Resistivity; Thermal conductivity; Thermophysical properties; Viscosity; Plasma composition; Thermophysical properties of thermal plasmas; Electrical conductivity; Lennard–Jones interaction potential; Ionized gas mixtures; Effective collision cross sections; Thermal conductivity; Collision integrals; Chapman–Enskog method in the 4th approximation; Thermodynamic properties; Screened Coulomb potential
• ISSN: 0272-4324; 1572-8986
• DOI: 10.1007/s11090-007-9113-z

The article presents the calculation of thermophysical properties of the mixture water steam–argon which has been used to further enhance the characteristics of plasma torches stabilized by the water wortex. The calculations were performed at the temperatures 400–50,000 K and at 0.1 MPa. First, the composition and thermodynamic properties are determined by classical methods. Further the calculations of viscosity, electrical conductivity and thermal conductivity of the mixture are computed in the 4th approximation of the Chapman–Enskog method. The computation of collision integrals is described with special respect to the interactions of charged particles where the necessary calculations for the Coulomb potential screened at the Debye length were enlarged to cover the 4th approximation. Then the formulae describing the method based on the variational principle of solving the system of Boltzmann integrodifferential equations are shortly introduced and the transport coefficients are presented.