Which statement correctly describes segregated flow?

• A. The phases are fully dispersed in each other.
• B. The two phases are for the most part separate.
• C. Gas and liquid periodically break into large bubbles only.
• D. The flow is uniform with equal fractions of gas and liquid.

Answer: (B)

Segregated flow means the gas and liquid occupy distinct regions with a clear interface and do not mix into a single, uniform mixture. The phases stay apart most of the time, which is why that choice best describes segregated flow. If the phases were fully dispersed in each other, you’d have dispersed flow; if gas and liquid periodically break into large bubbles, that points to slug or intermittent flow; if the flow were uniform with equal fractions, that would be a homogeneous, well-mixed flow rather than segregated.