Analysis of the Cavitation Bubble Collapse by Observing the Faint Light Emission

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Other Title
  • B309 微弱光観測によるキャビテーション気泡崩壊の解析

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Abstract

Mechanical heart valves (MHVs) are used as the prostheses for the patients with the irreversible heart valve disorder. The cavitation occurs on MHVs, and it could lead to the valve failure and also could damage blood cells. The cavitation bubble collapse causes high pressure and high temperature, then this severe condition brings about the cavitation erosion. The conventional observation method, such as a stroboscope and a highspeed camera, can hardly obtain the information about the cavitation bubble implosion. The researches on ultrasound showed that the collapsing bubbles emit the faint light, which is called sonoluminescence. Therefore, the observation of the faint light from the cavity collapse on a MHV was tried in this study. A highly sensitive CCD camera and a photomultiplier tube were adopted for spatial and temporal analysis of the cavity collapse, respectively. The faint light was captured around the position where the bubbles were observed with a stroboscope. Then the faint light emitted immediately after the disappearance of the bubbles on the photos obtained using a stroboscope. The results show that the observation of the faint light emission would be a powerful tool for the analysis of the flow-induced cavitation.

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Details

  • CRID
    1390001204619944960
  • NII Article ID
    10012625621
    130003649883
  • NII Book ID
    AA11907562
  • DOI
    10.3154/jvs.23.supplement1_445
  • ISSN
    1884037X
    09164731
  • Text Lang
    ja
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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