Development of a .SIGMA.-Type Plate Static Micromixer and Its Mixing Performance

• Ohkawa Kazuo

  Process Chemistry Labs., Astellas Pharma Inc. Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University

• Nakamoto Takashi

  Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University

• Inoue Yoshiro

  Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University

• Hirata Yushi

  Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University

Bibliographic Information

Other Title

• σ型平板静止マイクロミキサーの開発およびその混合特性
• シグマガタ ヘイバン セイシ マイクロミキサー ノ カイハツ オヨビ ソノ コンゴウ トクセイ

Abstract

A new plate static micromixer interconnected with σ-type unit elements in series has been developed, which has systematic mixing functions of division and multiplayer formation of fluid layers by combining splitting, realignment and recombination of fluid streams. The number of unit elements required for complete mixing n was measured by conducting the decolorizing reaction of iodine with sodium thiosulfate for various Reynolds numbers Re and flow ratios of two fluids to be mixed. At low Re, n increased with Re and its variation with operating variables and device dimensions were well correlated by use of a functional relation derived from a model analysis for the diffusion process in a fluid layer whose thickness is reduced by half after the fluid passes through each unit element. When Re exceeds 10, n begins to decrease with Re. Under the condition of large Reynolds number, CFD analysis shows that a large deformation and stretch of the fluid interface takes place due to the bending and winding channel structure of σ-type element, and the mixing rate is accelerated through the deformed and stretched interface. n was correlated experimentally with Re and a variable representing Schmidt number derived from the model. In addition, the effects of aspect ratio were investigated by CFD analysis. In order to promote ideal fluid mixing of splitting and recombination and efficient removal of heat generated by reaction in σ-type plate static mixer, it is recommended to adopt channels whose cross-section is as close as possible to a square.

Journal

• KAGAKU KOGAKU RONBUNSHU

  KAGAKU KOGAKU RONBUNSHU 31 (6), 457-465, 2005

  The Society of Chemical Engineers, Japan

Keywords

• Micromixer
• Plate Static Mixer
• Splitting and Recombination
• Computational Fluid Dynamics
• Microreactor

Details

• CRID: 1390001204509568640
• NII Article ID: 130000018604
• NII Book ID: AN00037234
• DOI: 10.1252/kakoronbunshu.31.457
• COI: 1:CAS:528:DC%2BD28XmtVOksA%3D%3D
• ISSN: 13499203
• ISSN: 0386216X
• NDL BIB ID: 7745994
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7745994
• Web Site: http://www.jstage.jst.go.jp/article/kakoronbunshu/31/6/31_6_457/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed