E113 チャンネル内のケルビン・ヘルムホルツ不安定などの粘性ポテンシャル流解析

概要

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The stability of stratified gas-liquid flow in a horizontal rectangular channel is studied by using viscous potential flow. The analysis leads to an explicit dispersion relation in which the effects of surface tension and viscosity on the normal stress are important. The maximum critical value of the relative velocity is given when the viscosity ratio is equal to the density ratio; surprisingly the neutral curve for this viscous fluid is the same as the neutral curve for inviscid fluids. The viscosity of the liquid has a strong effect on the growth rate. The viscous potential flow theory fits the experimental data for air and water well when the gas fraction in the channel is greater than about 70%. Some instability mechanisms are also studied by the viscous potential flow analysis.
日本流体力学会の論文
2001-07-31