VV-exchange in direct Monte Carlo simulation of rarefied gas flows

Authors

  • Ye.A. Bondar
  • S.F. Gimelshein
  • A.N. Molchanova
  • M.S. Ivanov

Keywords:

direct simulation Monte Carlo method
VV-exchange
RT-exchange
VT-exchange
Larsen-Borgnakke model

Abstract

A question of modeling of vibration-vibration (VV) exchange in calculation of rarefied gas flows by the direct simulation Monte Carlo method is considered. Two simple models for VV-exchange in collisions of simple harmonic oscillator molecules are proposed: a model with single-quantum transitions and an extension of the Larsen-Borgnakke model used widely for RT- and VT-exchange. Computation of vibrational relaxation is performed for homogeneous test conditions and for the conditions of an experiment on vibrational population evolution in nitrogen excited vibrationally by a laser. The numerical results obtained are in good agreement with experimental data.

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Published

2014-09-18

Issue

Vol. 15 (2014): Issue 4.

Section

Section 1. Numerical methods and applications

Author Biographies

Ye.A. Bondar

S.A. Khristianovich Institute of Theoretical and Applied Mechanics of SB RAS
• Head of Laboratory

S.F. Gimelshein

Novosibirsk State University
• Head of Laboratory

A.N. Molchanova

Novosibirsk State University,
Department of Mathematics and Mechanics,
ул. Пирогова, 1, 630090, Новосибирск
• PhD Student

M.S. Ivanov

S.A. Khristianovich Institute of Theoretical and Applied Mechanics of SB RAS

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