Question

The best purpose served by the baffles used in agitated vessels is to:

• A. create flow patterns
• B. form the suspension of fine drops
• C. form the emulsions of fine drops
• D. suppress vortex formation

Hint:

Baffles in agitated vessels are primarily used to prevent vortex formation, ensuring effective mixing and improving the flow dynamics inside the vessel.

Answer 1

The Correct Option is D

Step 1: Purpose of baffles.
Baffles are installed in agitated vessels to control the flow and improve mixing. One of the main purposes of using baffles is to reduce or eliminate vortex formation at the center of the tank, which would otherwise reduce the efficiency of the mixing process.

Step 2: Analysis of options.
- (A) create flow patterns: While baffles do help in creating controlled flow patterns, the primary reason for using them is to suppress vortex formation. - (B) form the suspension of fine drops: Baffles are not specifically used for forming suspensions of drops; they assist in uniform mixing. - (C) form the emulsions of fine drops: This is not a primary function of baffles; emulsification is influenced by the mixing speed and type of impeller. - (D) suppress vortex formation: This is the correct function of baffles, as they prevent vortex formation and promote better mixing.

Final Answer: \[ \boxed{\text{D) suppress vortex formation}} \]