21005 高粘性流体における急減圧時の気泡生成挙動(OS10 マイクロ・ナノ熱流体工学(1),オーガナイズドセッション)

概要

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In volcanic eruption, bubble nucleation and growth processes in magma which is high viscous fluid have an important role in scale of eruption. However, the factor to affect bubble nucleation caused by rapid decompression is not clarified. In the present study, the rapid decompression experiments with silicone oil as high viscous fluid are conducted to observe bubble nucleation behavior. The number of bubbles nucleated increases with the decompression rate. Bubble number density is measured from the observed images and compared with the previous study. It is confirmed that volatile component and dissolved air in fluid do not affect bubble nucleation. The effect of existing bubble nucleus on the number of bubbles nucleated is discussed.
2010-03-09