Two-component flow study in large-diameter horizontal pipe Page: 5 of 30
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Flow regimes In a horizontal straight pipe. Smooth stratified flow occurs when
the liquid is at the bottom of the pipe and the gas flows along the top with the liquid
surface being smooth. Wavy stratified flow is similar to smooth stratified; however, the gas-
liquid interface becomes wavy. The intermittent flow is characterized by the liquid bridging
(hydraulic jump) the gap between the gas-liquid interface and the top of the pipe. Plug
flow is considered to be the limiting case of slug flow where no entrained bubbles exist in
the liquid slug. Both slug and plug flows are called intermittent flow regime. In the
dispersed flow regime, small gas bubbles are distributed throughout the liquid phase. The
transition to dispersed regime is characterized by the gas bubbles losing contact with the
top of the tube and becoming uniformly distributed throughout the pipe as liquid flow rate
Test Facility Description
Piping arrangement. The Wyle facility is designed to accommodate long straight test
sections up to 30.2 m (99 ft) long. Figure 1 shows the plant view of the test configuration.
The loop consists of several tanks to supply v4ter and gas to the test section and to
receive the effluent flow. The 94.6-m3 (25000-gallon) water supply tank injects water into
the test loop via a 24-in. schedule-20 pipe. Water is driven from the water tank under
nearly constant head supplied by air through an operator regulating value, from a large
pressurized air tank. Two control valves (CV1 and CV2), located near the water supply
tank exit and receiver tank inlet, respectively, were used for back pressure setting and
Draft WSRc-MS-91-393 1213/91 page 4
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Eghbali, D.A. Two-component flow study in large-diameter horizontal pipe, article, December 3, 1991; Aiken, South Carolina. (https://digital.library.unt.edu/ark:/67531/metadc1061780/m1/5/: accessed March 18, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.