Modeling active micromixers with multiple microstirrers using smoothed particle hydrodynamics

Jafarian, A ; Sharif University of Technology

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  1. Type of Document: Article
  2. Abstract:
  3. The smoothed particle hydrodynamics method is used to explore the effects of design parameters on the mixing efficiency of two types of active micromixer. First, the complex flow field and the mixing process of two separated fluids in a square mixing chamber with nine symmetric microstirrers are simulated. The influence of design parameters, such as the microstirrer rotation arrangement and the angular velocity of the microstirrer, on the mixing performance, is investigated. The mixing index parameter on ten control points is calculated and the average mixing index is compared for different cases. Simulations illustrate that the rotation arrangement of microstirrers is a key parameter in the mixing process. Then, a parametric study is performed for a horizontal and a Y-shaped active micromixer, where the influence of length, angular velocity, rotation or oscillation movement of the microstirrer, inlet Reynolds number, and inlet stream angle is investigated. It is also illustrated that the inlet Reynolds number and the Struhal number are prominent parameters that affect the mixing efficiency of this type of active micromixer
  4. Keywords:
  5. Micromixer ; Microstirrer ; Mixing chamber ; Smoothed particle hydrodynamics ; Angular velocity ; Fluid dynamics ; Hydrodynamics ; Mixing ; Reynolds number ; Micro mixers ; Microstirrer ; Molecular diffusion ; Mixers (machinery)
  6. Source: Scientia Iranica ; Vol. 21, issue. 4 , 2014 , pp. 1390-1402 ; ISSN: 10263098
  7. URL: http://www.scientiairanica.com/en/ManuscriptDetail?mid=211