3.4. AGITATION AND MIXING OF FLUIDS AND POWER REQUIREMENTS

3.4A. Purposes of Agitation

In the chemical and other processing industries, many operations are dependent to a great extent on effective agitation and mixing of fluids. Generally, agitation refers to forcing a fluid by mechanical means to flow in a circulatory or other pattern inside a vessel. 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.

There are a number of purposes for agitating fluids, some of which are briefly summarized:

  1. Blending of two miscible liquids, such as ethyl alcohol and water.

  2. Dissolving solids in liquids, such as salt in water.

  3. Dispersing ...

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