21220 偏平狭間隙垂直矩形流路内気泡上昇速度に関する(伝熱・二相流,一般講演,学術講演)

概要

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The velocity of a single gas bubble such as a plug bubble rising in stagnant liquid in narrow-flat-rectangular channels was examined. Experiments were performed using air and water at the atmospheric pressure and the room temperature. The test channels vertically oriented were 1〜10 mm in depth and 10〜150 mm in width. When the bubble had the shape of the plug in both the depth and the width, the rising velocity was well predicted with the White et al. correlation for the plug in a circular tube. As the plug began to lose the shape of the plug in the width with a decreasing in the volume of the bubble, the rising velocity began to deviate from the plug velocity in the circular tube. After the occurrence of this deviation, the rising velocity tended to approach to the rising velocity of the bubble in the wide-large channel given by the Peebles et al. correlation. When the channel became quite narrow, the rising velocity became slower than the velocity of the Peebles et al. correlation.
社団法人日本機械学会の論文
2008-03-13