Mixing usually implies the taking of two or more separate phases, such as a fluid and a powdered solid or two fluids, and causing them to be randomly distributed through one another.

Agitation refers to forcing a fluid by mechanical means to flow in a circulatory or other pattern inside a vessel

Blending: Agitation of two miscible liquid phase

Suspension: Suspending solid particles into liquid.

Dispersion: Dispersing a gas through the liquid in the form of small bubbles.

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