FLUIDITY CHARACTERISTICS OF WATER SLUG FLOW CAUSED BY COMPRESSED AIR IN HORIZONTAL PIPE FLOW

Abstract

Recently, the high-density mud transport systems using a compressed air are utilizing in the field of coastal zone developments. This system is very useful for high-density slurry transport because it is easily to separating air from slurry. The purpose of this paper is to clarify the mechanism of slurry transpo-rting system using a compressed air in the experimentally. In the experiment, the air-liquid twophase flows have been focused on liquid of low viscosity in long distance pipelines with narrow diameter and discussed the mechanism of generating, development and breakdown of slug flows. As the results of experiments it was shown that the water depth of slug flow generating is nearly constant for all conditions of air-water mixing ratio in pipe flow.