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2014 | 35 | 3 | 369-385
Tytuł artykułu

Numerical Analysis Of Mixing Under Low And High Frequency Pulsations At Serpentine Micromixers

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The numerical investigation of the mixing process in complex geometry micromixers, as a function of various inlet conditions and various micromixer vibrations, was performed. The examined devices were two-dimensional (2D) and three-dimensional (3D) types of serpentine micromixers with two inlets. Entering fluids were perturbed with a wide range of the frequency (0 - 50 Hz) of pulsations. Additionally, mixing fluids also entered in the same or opposite phase of pulsations. The performed numerical calculations were 3D to capture the proximity of all the walls, which has a substantial influence on microchannel flow. The geometry of the 3D type serpentine micromixer corresponded to the physically existing device, characterised by excellent mixing properties but also a challenging production process (Malecha et al., 2009). It was shown that low-frequency perturbations could improve the average mixing efficiency of the 2D micromixer by only about 2% and additionally led to a disadvantageously non-uniform mixture quality in time. It was also shown that high-frequency mixing could level these fluctuations and more significantly improve the mixing quality. In the second part of the paper a faster and simplified method of evaluation of mixing quality was introduced. This method was based on calculating the length of the contact interface between mixing fluids. It was used to evaluate the 2D type serpentine micromixer performance under various types of vibrations and under a wide range of vibration frequencies.
Wydawca

Rocznik
Tom
35
Numer
3
Strony
369-385
Opis fizyczny
Daty
wydano
2014-09-01
otrzymano
2014-01-01
poprawiono
2014-04-24
zaakceptowano
2014-07-20
online
2014-10-17
Twórcy
  • University of New Hampshire, Program in Integrated Applied Mathematics, Durham, NH 03824, USA, ziemowit.malecha@pwr.edu.pl
  • Wrocław University of Technology, Department of Cryogenic, Aviation and Process Engineering, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
  • Wrocław University of Technology, Faculty of Microsystem Electronics and Photonics, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
Bibliografia
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  • Kudela H., Malecha Z.M., 2009. Eruption of a boundary layer induced by a 2D vortex patch. Fluid Dyn. Res., 41, 055502. DOI: 10.1088/0169-5983/41/5/055502.[Crossref]
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  • Malecha Z.M., Chorowski M., Polinski J., 2013. Numerical study of emergency cold helium relief into tunnel using a simplified 3D model. Cryogenics, 57, 181-188. DOI: 10.1016/j.cryogenics.2013.07.006.[Crossref][WoS]
  • Malecha Z.M., Mirosław L., Tomczak T., Koza Z., Matyka M., Tarnawski W., Szczerba D., 2011. GPU-based simulation of 3D blood flow in abdominal aorta using openfoam. Archives of Mechanics, 63, 137-161.
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_cpe-2014-0028
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