• the counter-jet formation in an air bubble induced by the impact of shock waves

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 824
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the interaction of an air bubble (isolated in water or attached to a boundary) with shock waves induced by electric sparks is investigated by high-speed photography. the interaction is closely related to the counter-jet induced by the impact of shock waves. the formation of a counter-jet in an air bubble is related to the liquid jet formed in the same air bubble, but the mechanism is different with that of the counter-jet formation in a collapsing cavitation bubble. the formation of a counter-jet in an air bubble is related to discharge energy, air bubble size and radius of shock wave. with a given energy of the spark discharge, the formation of a counter-jet in an air bubble is related to δ/ɛ (the ratio of the dimensionless bubble-bubble distance to the dimensionless air bubble radius). the counter-jet will only be produced when δ/ɛ is in the range of 1.2–2.2. the counter-jet in an air bubble is of an important nuclei-generating mechanism.

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