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Mixing characteristics of motionless mixers

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Abstract

Motionless mixers have found a large range of applications, including blending, reaction, dispersion, heat transfer and mass transfer. Understanding the mixing processes that occur in these diverse systems is essential for predicting many aspects of practical importance. The objective of this study is to perform the experimental investigations of mixing characteristics for three different motionless mixers. The red color dye tracer was mixed in the main stream of green hair styling gel, and then the mixing efficiency was quantified by calculating the percentage area concentration of red color at the outlet cross section using a digital image processing technique. In the Sulzer SMX and YHC mixer, a single element mixes the fluid nearly in two dimensions, and three-dimensional mixing is accomplished by the next elements aligned at 90o to their former one. In the Sulzer SMX mixer, the flow appears to be globally well mixed after 5 elements, while in the YHC and YNU mixers, it is necessary to globally well mix more than 1 and 2 elements.

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Hei-Cheon Yang: He received his Ph.D (Eng) degree in Mechanical Engineering in 1994 from Chungang University in Seoul. He has been working as an associate professor in Chonnam National University, School of Mechanical and Automotive Engineering since 1997. His research interests are quantitative visualization, design and performance test of motionless mixers and thermal reactor, computational fluid dynamics.

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Yang, H.C. Mixing characteristics of motionless mixers. J Vis 10, 83–89 (2007). https://doi.org/10.1007/BF03181807

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Keywords

  • Motionless Mixer
  • Mixing Element
  • Mixing Characteristics
  • Visualization
  • Digital
  • Image Processing Technique