The viscosity of four binary, gaseous mixtures at 20° and 30°C

Kestin, J.; Kobayashi, Yumi; Wood, R.T.

doi:10.1016/0031-8914(66)90143-1

Cited by 87 publications

(25 citation statements)

References 9 publications

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“…The large body of experimental data available for Ar-CO 2 include measurements of its spectra, 1-6 interaction second virial coefficients, 7-13 molecular beam scattering, 14,15 infrared, [16][17][18][19][20][21][22] and Raman 23 pressure broadenings, transport [24][25][26][27][28] and nuclear spin relaxation 29,30 properties. The experimental data have been used to obtain a number of empirical 5,14,[31][32][33][34][35] and semiempirical 36 potential energy surfaces ͑PESs͒ for this complex.…”

Section: Introductionmentioning

confidence: 99%

Spectra of Ar–CO2 from ab initio potential energy surfaces

Misquitta

Bukowski

Szalewicz

2000

The Journal of Chemical Physics

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A new ab initio interaction energy surface and high-resolution spectra of the H 2 -C O van der Waals complex Potential energy surface for the interaction of Ar with CO 2 has been calculated using different levels of symmetry-adapted perturbation theory ͑SAPT͒ and the supermolecular many-body perturbation theory ͑MBPT͒ and coupled-cluster methods. These potentials have been used to compute the rovibrational spectra of Ar-CO 2 and the interaction virial coefficients. The best reproduction of experimental data was achieved by the SAPT potential at the level of theory similar to the second-order of MBPT. The accuracy of this potential is in fact very close to that of the recent semiempirical surface of Hutson et al. ͓J. Chem. Phys. 106, 9130 ͑1996͔͒ which was fitted to this set of data. Somewhat surprisingly, the more advanced methods considered here performed not as well.

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Section: Introductionmentioning

confidence: 99%

Spectra of Ar–CO2 from ab initio potential energy surfaces

Misquitta

Bukowski

Szalewicz

2000

The Journal of Chemical Physics

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“…1-5 shows that when T > T cr and < 2 cr , the differences between the actual and diluted values of the viscosity and thermal conductivity of noble gases and nitrogen are solely functions of the density and not the temperature [21][22][23]. When plotted versus the reduced density (= cr ), the excess viscosity is described by a single curve ( Fig.…”

Section: A Dynamic Viscosity Of Pure Gasesmentioning

confidence: 97%

“…The molar density of the He-N 2 binary gas mixtures in Eqs. (20)(21)(22)(23), (30), and (32) is calculated next.…”

Section: Enthalpy and Specific Heats Of Pure Gases And Mixturesmentioning

confidence: 99%

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Properties of Helium, Nitrogen and He-N2 Binary Gas Mixtures

Tournier

El‐Genk

2008

Journal of Thermophysics and Heat Transfer

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An extensive review is conducted and a comprehensive database is compiled for the transport and thermodynamic properties of helium and nitrogen and their binary mixtures at pressures up to 40 MPa and temperatures from 200 to 1500 K. These gases are attractive working fluids in a closed Brayton cycle for energy conversion in space reactor power systems and terrestrial power plants. Semi-empirical correlations are developed for calculating the properties of the He-N 2 binary mixtures based on the Chapman-Enskog kinetic theory for dilute gases and the application of the law of corresponding states. The correlations accurately account for the effects of pressure and temperature and are in excellent agreement with the compiled properties database. Nomenclature A 12 = ratio of collision integrals, 2;2 = 1;1 a k = polynomial coefficientsmolar specific heat at constant volume, J=mol K c = speed of sound, m=s f 12 = higher-order correction factor H = molar enthalpy, J=mol k = Boltzmann constant, 1:380662 10 23 J=K M = molecular weight, kg/mol m = mass of one gas molecule (M=N A , kg N = number of components in a gas mixture N A = Avogadro number, 6:022045 10 23 mol 1 P = pressure, Pa R g = perfect gas constant, 8:31441 J=mol K S = molar entropy, J=mol K T = temperature, K T cr , T ii = critical temperature of pure gas, K T o = reference temperature, K T = pseudocritical temperature, K T ij = interaction temperature, i ≠ j, K U = molar internal energy, J/mol V = characteristic molar volume of the gas mixture, m 3 =mol V ii = characteristic molar volume of pure gas [V R g T cr =P cr i ], m 3 =mol V ij = characteristic interaction molar volume (i ≠ j), m 3 =mol x i = molar fraction of component i in the gas mixture Z = compressibility factor = excess conductivity T; P o T, W=m K r = normalized excess conductivity, = cr o T cr = excess viscosity T; P o T, Pa s r = normalized excess viscosity, = cr o T cr " ij = depth of molecular potential well, J = reduced temperature, (T=T cr ) = thermal conductivity, W=m K = pseudocritical conductivity, W=m K = dynamic viscosity, Pa s = pseudocritical viscosity, Pa s = gas molar volume, m 3 =mol = density, kg=m 3 = molar density =M, mol=m 3 r = reduced density = cr ij = distance for which the molecular potential is zero, m = dimensionless function of reduced density k;l = dimensionless collision integral Subscripts cr = critical exp = experimental o = dilute-density value, reference value at 0.1 MPa r = reduced (dimensionless) = thermal conductivity = dynamic viscosity 1 = heavier gas component in mixture (nitrogen) 2 = lighter gas component in mixture (helium) Superscripts o = dilute-density value, reference value at 0.1 MPa = gas-mixture property = critical or pseudocritical

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“…The complete Enskog theory7.8 shows that the density coefficients of viscosity and of the translational contribution to the thermal conductivity for pure rigidsphere gases are related by the expression, O:llhll = 7/23 = 0.304, (19) indicating that O:llhll should be a constant. On the other hand the dimerization model of the density dependence of the transport coefficients developed by Ross and co-workers 22 .…”

Section: Prediction Of Thermal Conductivitymentioning

confidence: 99%

Viscosity and Thermal Conductivity of Moderately Dense Gas Mixtures

Wakeham

Kestin

Mason

et al. 1972

The Journal of Chemical Physics

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The paper presents a simple, semitheoretical expression for the initial density dependence of the viscosity and thermal conductivity of gaseous mixtures in terms of the appropriate properties of the pure components and of their interaction quantities. The derivation is based on Enskog's theory of dense gases and provides us with an equation in which the composition dependence of the linear factor in the density expansion is explicit. The interaction quantities are directly related to those of the mixture extrapolated to zero density and to a universal function valid for all gases. The reliability of the formulation is assessed with respect to the viscosity of several binary mixtures. It is found that the calculated viscosities of binary mixtures agree with the experimental data with a precision which is comparable to that of the most precise measurements. The method developed in the paper allows us to calculate the viscosity and thermal conductivity of moderately dense binary and multicomponent mixtures of gases. The evaluation of the respective properties in the limit of zero density has been made possible by the law of corresponding states developed by Kestin, Ro, and Wakeham.

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The viscosity of four binary, gaseous mixtures at 20° and 30°C

Cited by 87 publications

References 9 publications

Spectra of Ar–CO2 from ab initio potential energy surfaces

Spectra of Ar–CO2 from ab initio potential energy surfaces

Properties of Helium, Nitrogen and He-N2 Binary Gas Mixtures

Viscosity and Thermal Conductivity of Moderately Dense Gas Mixtures

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