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A classical dynamics study of rotational relaxation in nitrogen gas

Author

Listed:
  • Turfa, A.F.
  • Knaap, H.F.P.
  • Thijsse, B.J.
  • Beenakker, J.J.M.

Abstract

Rotational relaxation, related to the experimentally accessible volume viscosity, is described to the first order in the Sonine polynomial expansion of nonequilibrium distribution functions by the well known Wang Chang, Uhlenbeck, and De Boer expression. By a classical trajectory evaluation of a classical limit of this expression, using a recently proposed anisotropic inter-molecular potential for N2-N2, results are obtained for the rotational relaxation cross section. A corresponding expression including second order Sonine terms is also investigated. The second order results are found to differ significantly from the first order treatment (by about 18% at room temperature) and to agree very well with ultrasonic measurements over a temperature range from 77 K to 293 K.

Suggested Citation

  • Turfa, A.F. & Knaap, H.F.P. & Thijsse, B.J. & Beenakker, J.J.M., 1982. "A classical dynamics study of rotational relaxation in nitrogen gas," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 112(1), pages 18-28.
    • Handle: RePEc:eee:phsmap:v:112:y:1982:i:1:p:18-28
    DOI: 10.1016/0378-4371(82)90205-9
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    References listed on IDEAS

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    1. Coope, J.A.R. & Sanctuary, B.C. & Beenakker, J.J.M., 1975. "The influence of nuclear spins on the transport properties of molecular gases and application to HD," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 79(2), pages 129-170.
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