Preparation of Uniformly Sized Emulsions using a High Velocity Revolution Mixer

DOI Web Site Web Site 27 References

Bibliographic Information

Other Title
  • 高速回転ミキサーを用いた均一エマルジョン調製
  • コウソク カイテン ミキサー オ モチイタ キンイツ エマルジョン チョウセイ

Search this article

Abstract

<p>The cylindrical-wall revolving mixer (CRM) is a high velocity revolution mixer used in industry to produce emulsions with uniform droplet size. However, fundamental verification data and the mechanism by which this mixer imparts size uniformity have not been clarified. In this study, we compared the droplet size distributions of emulsions produced by a CRM and a general rotor-stator mixer. We also conducted an impulse response experiment and analyzed mixer flow using flow visualizations and computational fluid dynamics (CFD) simulations. The preparation results showed that the CRM produces more uniform emulsions than the general rotor-stator mixer operated with a clearance of 0.5–2.0 mm between the rotor and stator. The impulse response results showed that the holding time distribution of processing liquid is approximately the same for the CRM and the general rotor-stator mixer. The flow visualization results near the clearance showed a uniform steady flow state in the CRM but a turbulent flow state with unsteady flow in the general rotor-stator mixer. The CFD simulations indicated that the CRM had a significant supply of the processing liquid in the high velocity gradient region, and that the velocity gradient tended to be uniformly even. These results suggested that the flow state near the clearance and the velocity gradient are important factors for generating a uniform emulsion.</p>

Journal

References(27)*help

See more

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top