2010 2(4)

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Markovich D.M.1,2, Kharlamov S.M.1, Cherdantsev A.V.1,2, Cherdantsev M.V.1

1 Institute of Thermophysics SB RAS, Novosibirsk, Russia
2 Novosibirsk State University, Novosibirsk, Russia


Markovich, D.M., Kharlamov, S.M., Cherdantsev, A.V. and Cherdantsev, M.V., (2010) Generation of ripple waves by disturbance waves in annular flow, Modern Science: Researches, Ideas, Results, Technologies, Iss. #2(4), PP. 78 - 83.


dispersed annular flow; ripple waves; disturbance waves; laser induced fluorescence


The present work is dedicated to investigation of the wavy structure of liquid film in annular flow using laser induced fluorescence method (LIF). The most part of researchers who investigated annular flow used methods with spatial resolution not sufficient to investigate small scale waves (ripples) on the film surface. 2D- and 3D- investigations of wavy liquid film have been completed with spatial resolution 0.1 mm*0.5 ms and 0.1 mm*0.1 mm*2 ms respectively. It was observed that ripple waves can move either faster or slower than disturbance waves. It was observed that appearance of ripple waves occurs due to instability of rear side of disturbance waves and relative position of the area of ripples generation on disturbance wave doesn’t depend on gas velocity. The area of fast ripples generation lays closer to the front side of disturbance wave. Three-dimensional wave pictures for annular flow have been obtained. Understanding of three-dimensional nature of ripples waves has been extended.


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