Abstract

The flow around a stationary gas bubble in an annular channel was studied. The channel had a diameter of the outer and inner tubes of 32 and 10 mm, respectively. The liquid flow was downward. The stationary bubble was produced by injection of air through a capillary tube. The wall shear stress measurements were performed by the electrodiffusional technique. The measured circumferential distributions of the wall shear stress demonstrated strong nonuniformity across the channel. The highest liquid velocity was in the region of the bridge flowing around the bubble.

中文翻译：

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带有固定气泡的环形通道的壁面剪应力分布

摘要

研究了环形通道中静止气泡周围的流动。该通道的外管和内管的直径分别为 32 和 10 毫米。液体流向下。静止气泡是通过毛细管注入空气产生的。通过电扩散技术进行壁剪切应力测量。测量的壁剪应力的周向分布表明整个通道存在强烈的不均匀性。最高液体速度在围绕气泡流动的桥区域。