Numerical Simulation of Atomic Beam Collision through a Slit with Wall Interaction

• Published in: Nihon Kikai Gakkai rombunshuu. B hen Vol. 60; no. 571; pp. 774 - 781
• Main Authors: Shioda, Kazunori, Nishizawa, Katsushi, Kuwako, Akira, Ueda, Hiroaki
• Format: Journal Article
• Language: Japanese
• Published: The Japan Society of Mechanical Engineers 01.01.1994
• Subjects: Space Engineering
• ISSN: 0387-5016; 1884-8346
• DOI: 10.1299/kikaib.60.774

In this paper, molecular dynamical analyses of an atomic beam passing through a slit are presented. In the case where microscopic phenomena, such as in rarefied gas flow involving wall interaction as well as intermolecular collision, must be taken into account, the molecular dynamical method (MD method) is effective to analyze the individual behavior of constituent particles such as atoms, molecules or ions. Since the atomic beam here is highly rarefied, beam atoms suffer, at most, a few interatomic collisions in the process. Therefore, collision with the slit surface is cosidered to be more dominant than interatomic collision. Wall interaction has been modeled numerically, for example, as mirror reflection or Maxwell reflection, although such conventional models, in many cases, do not describe the real interaction with the wall surface. Here, a mixed reflection model is employed in order to simulate the beam propagation phenomena through a slit.