Industrial Mixing Basics - Baffled vs Unbaffled Tanks - Part 1

Center-Mounted Mixer in an Unbaffled Tank

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This video shows a center-mounted tank agitator with two hydrofoil impellers (ProQuip HiFlowTM) in an unbaffled, lab scale tank The impeller diameter is 1/3 tank diameter. The impellers are operating at typical rotational speed for this size impeller in water.
As can be seen in the video, a center-mounted mixer in an unbaffled tank with axial flow impellers provides very little top to bottom flow. This condition generates a significant center vortex, depending on impeller diameter and rotational speed. White plastic pellets with a specific gravity slightly less than water are added to aid in visualizing fluid flow. Colored pellets, with specific gravity slightly heavier than water, are added to represent suspension of solids. The primary flow pattern is rotating horizontally (which develops the vortex). Additionally, the heavier solids are not suspended and accumulate in the center of the tank.

For more information:
Industrial Mixing Basics - Baffled vs Unbaffled Tanks Part 2:    • Industrial Mixing Basics - Baffled vs Unba...  
Industrial Mixing Basics - Baffled vs Unbaffled Tanks Part 3:
   • Industrial Mixing Basics - Baffled vs Unba...  
Industrial Mixing Basics - Baffled vs Unbaffled Tanks Part 4:    • Industrial Mixing Basics - Baffled vs Unba...  

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