水平円柱側壁に沿って流下する液膜流の挙動に関する研究 : 第2報,液膜表面に現れる定在波の増幅機構(流体工学, 流体機械)

概要

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A standing wave with a peak line toward downstream appears on the surface of liquid film flowing around a horizontal circular cylinder. The amplitude of the wave grows in the downward direction since the centrifugal force grows because of the acceleration of the film flow by gravity. An equation of motion governing the wave amplification was theoretically derived. The amplitudes calculated by the equation agree with those measured experimentally for three kinds of test liquids. The approximate consideration of the above equation shows that the amplification ratio A is mainly dependent on a parameter Fr_0(R/δ_0) concerning gravitational and centrifugal forces, and slightly on the Reynolds number. Since the surface tension acting on the wave is linear to the film thickness, its effect on the amplification can be neglected.
一般社団法人日本機械学会の論文
2002-09-25