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Dynamics of Two-Phase Flows

ISBN Druckformat: 0-8493-9925-4

FUNDAMENTAL STUDY OF INTERFACIAL WAVES IN STRATIFIED FLOW

Abstrakt

Fundamental aspects of the behavior of fully developed solitary waves in two-phase stratified and wavy flows are discussed based on experimental results and results of numerical experiments. The wave-propagation velocity of fully developed solitary waves in two-phase stratified and wavy flows is expressed as the sum of the velocity of solitary waves on stationary liquid and the mean liquid velocity in stratified flow. The wave profile is given approximately by the wave profile on stationary liquid. The liquid velocity is given by the sum of the velocity induced by the wave on stationary liquid and the velocity of the stratified liquid flow. The static pressure in the liquid phase is given approximately by the sum of the static pressure of a solitary wave on stationary liquid and the gas pressure.
These simple relationships hold for flow conditions of fully developed solitary waves with relatively low velocities of liquid and gas. When the mean liquid velocity becomes large, the width of the wave profile decreases. The effect of the mean gas velocity on the solitary wave was rather small in the author's range of experiments up to 3.0 m/s. The applicability of the above-mentioned relationships was examined for the developing solitary wave, which led to the onset of slugging. The typical behavior of instability is discussed based on the data of the static pressure in liquid phase.
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