1435 不純物混入液体における気泡核生成の分子動力学的研究  [in Japanese] Molecular Dynamics Study of Bubble Nucleation in Liquid Including Impurities  [in Japanese]

In the present study, molecular dynamics simulation is applied to the analysis of the bubble nucleation in liquid oxygen including helium or nitrogen as impurities. All molecular interactions are given by the Lennard-Jones potential and simulations are excuted under the standard boiling point of oxygen (90K). Under a high concentration, helium molecules make a cluster based on the phase separation while nitrogen molecules do not. In addition, it is found that the effect of helium molecules which make a bigger local void under a lower concentration is strong while the nitrogen molecules make a smaller one even under a higher concentration. Based on the simulation results, it is pointed out that the helium molecules have a possibility to raise the nucleation point even under a lower concentration while nitrogen ones do not so much.