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Title: Relaxation of quantum state population and volume viscosity in He/H{sub 2} mixtures

A kinetic model for He-H{sub 2} mixtures is studied in a regime where elastic collisions are fast and inelastic collisions are slow. Application of the Chapman-Enskog method yields a state to state fluid model where each quantum state is a separate pseudo species. The relaxation of quantum state population towards thermodynamic equilibrium is investigated as well as the definition of volume viscosity coefficients. The theoretical results are applied to the quantum state population and volume viscosity of molecular hydrogen on the basis of a complete set of cross sections for the He+H{sub 2}(v, j) system.
Authors:
;  [1] ;  [2]
  1. IMIP, CNR, 70125 Bari (Italy)
  2. CMAP, CNRS, Ecole Polytechnique, 91128 Palaiseau (France)
Publication Date:
OSTI Identifier:
22390554
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1628; Journal Issue: 1; Conference: 29. International Symposium on Rarefied Gas Dynamics, Xi'an (China), 13-18 Jul 2014; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CALCULATION METHODS; CROSS SECTIONS; ELASTIC SCATTERING; HELIUM; HYDROGEN; INELASTIC SCATTERING; KINETIC EQUATIONS; LTE; MIXTURES; MOLECULE COLLISIONS; QUANTUM STATES; RELAXATION; VISCOSITY; VISCOUS FLOW