What are the two types of intermittent flow?

What are the two types of intermittent flow?

• A. Annular and Intermittent
• B. Stratified and Wavy
• C. Slug and Plug
• D. Distributive and Segregated

Answer: (C)

Intermittent flow means the gas and liquid in the pipe take turns occupying the cross-section, so you don’t have a smooth mixture. The two forms you’ll often see are slug flow and plug flow. In slug flow, large bodies of liquid fill much of the pipe with gas pockets separated between them. The gas pockets push the liquid slugs along, causing significant pressure changes and abrupt shifts in liquid content as each slug and gas pocket pass a point. In plug flow, discrete plugs of liquid nearly fill the pipe cross-section, with gas occupying the spaces between these plugs. The plugs migrate together with the gas, producing a cyclic pattern of high and low liquid content along the line. These are the main intermittent patterns because the phases alternate rather than form a uniform film or a steady, continuous interface. Other flow patterns described—like annular or stratified—represent different, more continuous configurations rather than this intermittent alternation.

Intermittent flow means the gas and liquid in the pipe take turns occupying the cross-section, so you don’t have a smooth mixture. The two forms you’ll often see are slug flow and plug flow.

In slug flow, large bodies of liquid fill much of the pipe with gas pockets separated between them. The gas pockets push the liquid slugs along, causing significant pressure changes and abrupt shifts in liquid content as each slug and gas pocket pass a point.

In plug flow, discrete plugs of liquid nearly fill the pipe cross-section, with gas occupying the spaces between these plugs. The plugs migrate together with the gas, producing a cyclic pattern of high and low liquid content along the line.

These are the main intermittent patterns because the phases alternate rather than form a uniform film or a steady, continuous interface. Other flow patterns described—like annular or stratified—represent different, more continuous configurations rather than this intermittent alternation.