Computational modeling of gas-surface interaction
Tóm tắt
In this study, a new computational modeling of the gas-surface interaction is proposed to explain the results of the scattering experiments of molecular beams from solid surfaces, especially from industrial surfaces. The characteristic feature of the model is to settle the adsorbed gas layer and the collision layer which involve adsorbed molecules and surface molecules, respectively. Incident molecules experience force due to the gas-solid potential gradient, changing their trajectories which is computed by Molecular Dynamics method. The gas molecules are scattered from the surfaces after collisions with adsorbed or surface molecules. The simulated results are compared with the experimental ones: i.e., flux distributions, TOF spectra and the average energy of scattered molecules.
Tài liệu tham khảo
Bird, G. A. 1976: Molecular Gas Dynamics, Oxford Univ. Press
Fujinmoto, T.; Furuya, Y.; Hayashi, T.; Takigawa, H. 1976: Scattering of Molecular Beams on the Polycrystalline Nickel Surface, Progress in Astrinautics and Aeronautics AIAA, 51: 565–574
Fujimoto, T.; Niimi, T.; Shobatake, K.; Kondo, K. 1993: A Scattering Experiment of Molecular Beams for Estimation of the Adsorption Probability, Vacuum, 44: 429–431
Furuya, Y.; Fujimoto, T.; Hayashi, T. 1976: Experiments on Scattering of Molecular Beams on Polycrystalline Platinum Surface, Japanese J. App. Phys. 15: 2413–2420
Goodman, F. O.; Wachman, H. Y.; 1976: Dynamics of Gas-Surface Scattering, Academic Press, 38
Kondo, K.; Fujimoto, T.; Niimi, T.; Tsukahara, A.; Shobatake, K. 1993: Scattering Experiments of Gas-Molecules from as Ion-Plated Surface, Proc. of 18th Int. Symp. on Rarefied Gas Dynamics, ed by Shizgal, B., AIAA, in press
Legge, H.; Nanbu, K.; Igarashi, S. 1990: Force and Heat Transfer on a Disk in Rarefied Flow, In: Beylich, A. E. (ed.): Rarefied Gas Dynamics, VCH, 679–686
Logan, R. M.; Stickney, R. E. (1966): Simple Classical Model for the Scattering of Gas Atoms from a Solid Surface, J. Chem. 44: 195–201
Logan, R. M.; Keck, J. C. 1968: Classical Theory for the Interaction of Gas Atoms with Solid Surfaces, J. Chem. Phys. 49: 860–876
Matsumoto, Y.; Matsui, J. 1990: Numerical Analysis of Gas-Surface Interaction by the Molecular Dynamics Method, In: Beylich, A. E. (ed.). Rarefied Gas Dynamics, VCH, 889–896
Tully, J. C. 1981: Dynamics of Gas-Surface Interactions: Thermal Desorption of Ar and Xe from Platinum, Surface Science 111: 461–478