Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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The Effect of Karman Vortex for Mixing in a Micro-channel with an Oscillating Micro-stirrer

진동 교반기가 있는 미소채널에서 혼합에 대한 Karman 와의 영향

  • 안상준 (한양대학교 대학원 기계공학부) ;
  • 맹주성 (한양대학교 기계공학부) ;
  • 김용대 (한양대학교 대학원 기계공학부)
  • Published : 2006.02.01
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Abstract

In order to consider the effect of Karman vortex for mixing, mixing indices are calculated for 4 models of micro channel flows driven from the combinations of a circular cylinder and a oscillating stirrer. And their results are compared to that of a simple straight micro channel flow(model I). The mixing rate is improved 5.5 times by Karman vortex (model II) and 11.0 times by the stirrer(model III) respectively. In case of successive mixing by the cylinder and the stirrer(model IV), $27\%$ of shortening the channel length for the complete mixing as well as 1.37 times improvement of mixing efficiency then model III. And then, variation of mixing indices are much stable comparing with the others. Thus, it is found that the Karman vortex plays a good role as a pre-mixing method. The D2Q9 Lattice Boltzmann methods are used.

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References

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