2次元液滴落下により生じた微小圧力波の伝播に関する差分格子ボルツマン法を用いた数値計算

抄録

In this paper, pressure propagations generated by liquid-gas interactions were investigated by using a newly proposed model of the finite difference lattice Boltzmann method. The model which based on a constitutive equation of pressure allows us to consider the sound speeds for gas and liquid phases. As for the liquid-gas flow with the density ratio of about 1 000, the liquid drop impacting against a thin liquid film in the two-dimensional space was compared with other calculations. Pressure propagations in the case of the two-dimensional drop falling to a deep liquid on a gravity field were clarified by using the same model. The pressure fluctuation was 10^-6 times smaller than the reference pressure had the unique directivity.