| Summary: | The visualization studies and the signal processing of the liquid hold-up data of
the air-water slug two-phase flow in a horizontal pipe were conducted
simultaneously. The liquid hold-up data were obtained by using a constant electric
current method (CECM). The principle of this method is on the basis of the
conductivity ratio of the two-phase components. The visualization study was
carried-out from the analyzing of the visual data obtained from the video camera.
As a result, it is found that: (1) the length of the air and water plug increases as
the increase of the air superficial velocity, meanwhile it decreases as the water
superficial velocity increases, (2) the average of liquid hold-up increases as the
increase of the air water velocity, meanwhile it decreases as the air superficial
velocity increases, (3) the velocity of the gas plug, slug, and wave velocity were
affected by both of the water and air superficial velocities, (4) the slug wave
frequency increases with water flow rate, but does not depend on air flow rate.
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