Transport coefficients of argon and its mixtures with helium and neon at low density based ab initio potentials

Sublimation and deposition in gaseous mixtures

“…The specific temperature range was chosen, where Helium can not be in a kg. The gas viscosities of Helium and Argon calculated ab initio in [45,24] are provided in Table 1 for two reference temperatures.…”

“…where is the equivalent free path [25], µ is the mixture viscosity [24] at the equilibrium temperature T 0 , v 0 is the characteristic molecular speed of the mixture defined as:…”

“…To implement LJ and AI potentials, the Ω integrals have been calculated numerically by the method described in details in Ref. [24]. In case of the LJ, the well depths and zero-points given in Table 2 have been substituted into the expression (37).…”

“…αβ Π (i) α + υ The dependence of the differential cross section σ on the energy E and deflection angle χ is determined by the potential of interatomic potential. In case of ab initio and Lennard-Jones potentials, the quantity σ(E, χ) is calculated numerically using the quantum theory to interatomic collision [24,51]. Then, the Ω…”

“…An experimentally obtained dependency of the saturation pressure on the temperature [23] is used for the chosen temperature range. In order to investigate the influence of the intermolecular potential on mass and heat transfer through the mixture in question, three potentials, namely, the Hard Sphere (HS), Lennard-Jones (LJ), and ab initio (AI) [24], are used to describe the intermolecular collisions. The corresponding numerical results are analysed and compared between them.…”