急激な引張りを受ける油の破れ

概要

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In the previous paper' the study of pressure waves in oil column separation led to the idea that an oil column should rupture when it is exposed to sudden tensile stress. The present paper subsequently deals with clarifying the idea of 'rupture'. In order to give evidence to the hypothesis, oil behavior in an acrylic tube during column separation is observed with a video camera and a photosensor: cavities are confirmed to emerge and disappear immediately after the reunion of separated columns. Theoretical discussion is held on a minute bubble with surface tension to see if it can consistently explain the ruptures and absolute negative pressures an oil column exhibits. In conclusion, the picture of oil rupture and cavitation is as follows: oil continuum yields to an excessive tensile force as metal does, then splits and produces a vacuum chasm into which resolved gas spreads from surrounding oil, which results in cavitation bubbles.
一般社団法人日本機械学会の論文
1990-08-25