Molecular Dynamics Study on Evaporation Process of Adherent Molecules on Surface by High Temperature Gas

  • Yang, Young-Joon (Department of Mechanical Engineering, Osaka University) ;
  • Osamu Kadosaka (Department of Mechanical Engineering, Osaka University) ;
  • Masahiko Shibahara (Department of Mechanical Engineering, Osaka University) ;
  • Masashi Katsuki (Department of Mechanical Engineering, Osaka University) ;
  • Kim, Si-Pom (Department of Mechanical Engineering, Dong-A University)
  • 발행 : 2004.12.01

초록

Surface degreasing method with premixed flame is proposed as the removal method of adherent impurities on materials. Effects of adherent molecular thickness and surface potential energy on evaporation rate of adherent molecules and molecular evaporation mechanism were investigated and discussed in the present study. Evaporation processes of adherent molecules on surface molecules were simulated by the molecular dynamics method to understand thermal phenomena on evaporation processes of adherent molecules by using high temperature gas like burnt gas. The calculation system was composed of a high temperature gas region, an adherent molecular region and a surface molecular region. Both the thickness of adherent molecules and potential parameters affceted the evaporation rate of adherent molecules and evaporation mechanism in molecular scale.

키워드

참고문헌

  1. Itoh, Y. et al., 1994, 'Proceedings of Pacific Rim Int. Conf. on Environmental Control of Combustion Processes,' AFRC/JFRC
  2. Itoh, Y., Taniguchi, N., Masaki, K. and Kobayashi, T., 2000, 'Large Eddy Simulation of a Premixed Combustion Flow in a Gas Turbine Combustor,' ISFV-6
  3. Jang, D. S., Lee, Y. W., Doh, D. H., Kobayashi, T. and Kang, C. S., 2001, 'Large Eddy Simulation of Flow around a Bluff Body of Vehicle Shape,' KSME Int. Journal, Vol. 15, No. 12, pp. 1835-1844
  4. Kobayashi, T. and Taniguchi, N. 2001, 'Visualization of Unsteady Fluid Flows by Using Large Eddy Simulation,' KSME Int. Journal, Vol. 15, No. 12, pp. 1750-1756
  5. Kotake, S. and Wakuri, S., 1994, 'Molecular Dynamics Study of Heat Conduction in Solid Materials,' JSME Int. Journal, B, Vol. 37, No. 1, pp. 103-108 https://doi.org/10.1299/jsmeb.37.103
  6. Kotake, S., 1990, 'Molecular Thermo-Fluid,' Maruzen
  7. Maruyama, S. and Kimura, T., 1999, 'A Study on Thermal Resistance over a Solid-Liquid Interface by the Molecular Dynamics Method,' Thermal Science & Engineering, Vol. 7, No. 1, pp. 63-68
  8. Maruyama, S., 1999, 'Molecular Dynamics Simulations for Phase-Interface and Phase-Change Phenomena,' Trans. JSME, Ser. B, Vol. 65, pp. 419-425 https://doi.org/10.1299/kikaib.65.419
  9. Matsumoto, M. et al., 1994, 'Microscopic Features of Evaporation and Condensation at Liquid Surfaces : Molecular Dynamics Simulation,' Thermal Science & Engineering, Vol. 2, No. 1, pp. 64-69
  10. Na, Y., 2003, 'Direct Numerical Simulation of Channel Flow with Wall Injection,' KSME Int. Journal, Vol. 17, No. 10, pp. 1543-1551
  11. Ohara, T. and Odagiri, H., 1998, 'Molecular Dynamics Study on Intermolecular Energy Transfer in Water,' Thermal Science & Engineering, Vol. 6, No. 4, pp. 1-8
  12. Ohara, T., 1999, 'Intermolecular Energy Transfer Characteristics of Simple Liquid in Heat Conduction,' Thermal Science & Engineering, Vol. 7, No. 1, pp. 53-91
  13. Reid, R. C. et al., 1977, 'The Propertied of Gases and Liquids,' 3rd Ed., McGraw-Hill, p. 678
  14. Shibahara, M. et al., 1999, 'Molecular Dynamics Study on Evaporation Process of Adhered Thin Film on Surface (Effects of Thickness of Thin Film and Surface Potential Energy),' Thermal Science & Engineering, Vol. 7, No. 5, pp. 41-50
  15. Shin, D. S., 2000, 'Direct Numerical Simulation of 3-Dimensional Axial Turbulent Boundary Layers with Spanwise Curvature,' KSME Int. Journal, Vol. 14, No. 4, pp. 441-447 https://doi.org/10.1007/BF03186438
  16. Watanabe, A. and Kotake, S., 1993, 'Study on Molecular Dynamics Mechanism of Heat Conduction,' Trans. JSME, Ser. B, Vol. 59, pp. 3913-3918 https://doi.org/10.1299/kikaib.59.3913