Construction of collision model of diatomic molecules (Improvement of energy transfer model and its verification)

Takashi Tokumasu, Yoichiro Matsumoto

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


In our 3rd report, we introduced a Lennard-Jones (LJ) potential parameter based on the potential obtained by ab initio calculation and collision cross section from the Wang-Chang, Uhlenbeck and Taxman's theory and molecular dynamics (MD) simulation. In the present study, we have improved the dynamic molecular collision (DMC) model to calculate the property of MD simulation better than the previous model. To confirm its validity we calculated the equilibrium state, the transport coefficient (viscosity coefficient and heat conductivity) at various temperatures and the normal shock wave by the direct simulation Monte Carlo (DSMC) method using the DMC model and compared the results with other theoretical and experimental results. Consequently, we found that the diatomic rarefied gas flows could be simulated very well using our model. These results were compared with those obtained by the Larsen Borgnakke model. It was found that this model was more efficient than the previous model.

Original languageEnglish
Pages (from-to)288-295
Number of pages8
JournalJSME International Journal, Series B: Fluids and Thermal Engineering
Issue number2
Publication statusPublished - 2000 May
Externally publishedYes


  • Collision model
  • DSMC method
  • Diatomic molecule
  • Internal energy
  • Molecular flow
  • Non-equilibrium
  • Numerical analysis
  • Rarefied gas
  • Shock wave

ASJC Scopus subject areas

  • Mechanical Engineering
  • Physical and Theoretical Chemistry
  • Fluid Flow and Transfer Processes


Dive into the research topics of 'Construction of collision model of diatomic molecules (Improvement of energy transfer model and its verification)'. Together they form a unique fingerprint.

Cite this