  In the chemical, petroleum and nuclear industries, pipelines are often used
to transport fluids from one process site to another one. The understanding of
the fluids behavior inside the pipelines is the most important consideration
for the engineers and scientists. From the previous studies, there are several
two-phase flow patterns in horizontal pipe. One of them is stratified flow
pattern, which is characterized by the liquid flowing along the bottom of the
pipe and the gas moving above it cocurrently. Another flow patterns are slug
and plug flow patterns. This kind of flow triggers the damage in pipelines,
such as corrosion, abrasion, and blasting pipe. Therefore, slug and plug flow
patterns are undesirable in pipelines, and the flow is maintained at the
stratified flow condition for safety reason. In this paper, the
analytical-based study on the experiment of the stratified flow pattern in a 26
mm i.d. horizontal pipe is presented. The experiment is performed to develop a
high quality database of the stratified two-phase flow pattern. The
experimental data were obtained from the visualization data by using a high
speed-video camera and were processed by using digital image processing
technique. Analytical method of two-fluid model was used to study the
interfacial behavior of the flow. The aim of this study is to validate the
previous correlations which are proposed by other researchers. The results show
that there are still many significant differences among each other. Hence,
better correlation should be proposed in the future. The discussion on the
basis of the comparison between the previous correlations with the present
analytical data is presented.
