In distributive flow, what is the arrangement of the phases?

• A. Gas pockets form discrete slugs
• B. The phases exist in separate layers with a smooth interface
• C. One phase is dispersed in the other phase
• D. Gas and liquid alternate along the flow path

Answer: (C)

Distributive flow means one phase is broken into many small droplets or bubbles that are dispersed throughout the continuous phase. The continuous phase surrounds and carries these dispersed droplets or bubbles, creating a dispersed pattern rather than distinct layers or large pockets. This is why the statement that one phase is dispersed in the other is the best description. It differs from stratified flow, where the phases sit in separate layers with a smooth interface, and from slug flow, where large pockets of one phase form elongated slugs. The dispersed arrangement captures the characteristic high interfacial area and mixed continuity of distributive flow.