気水混合物の流動第1報流動の様式と相対速度

概要

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The upward flow of the mixture of air and water in perpendicular glass tubes, which are 50.5 and 24 mm in inside diameter and 1400 mm in length, were observed and photographed. The flowing rate of water was between 0 and 130 cm^3/s/cm^2 of the tube cross section, and the rate of the air was between 0 and 55 in the same unit. 1. There are two types of flow. one is the separated flow and the other is the uniformly distributed flow, in which air bubbles of nearly equal size are uniformly distributed in the water. 2. The mean specific weight of the mixture has its minimum at the point of transition of the two types of flow. 3. In the separated flow, the relative velocity is affected by numerous factors and is substantially higher than that in the uniformly distributed flow. The relative velocity in the uniformly distributed flow is practically constant.
1952-08-15