Novel micromixers driven by flow instabilities: Application to post‐reactors | Zendy

Deshmukh S. R. | Zendy; Vlachos D. G. | Zendy

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Novel micromixers driven by flow instabilities: Application to post‐reactors

Author(s) -

Deshmukh S. R.,

Vlachos D. G.

Publication year - 2005

Publication title -

aiche journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.958

H-Index - 167

eISSN - 1547-5905

pISSN - 0001-1541

DOI - 10.1002/aic.10591

Subject(s) - micromixer , microscale chemistry , reynolds number , mixing (physics) , pressure drop , mechanics , wake , flow (mathematics) , computational fluid dynamics , micromixing , materials science , fluid dynamics , microfluidics , computer science , mechanical engineering , simulation , thermodynamics , nanotechnology , engineering , physics , mathematics , mathematics education , quantum mechanics , turbulence

Flow‐driven instabilites in microdevices, consisting of small features (posts), are studied using 2‐D computational fluid dynamics simulations as a means of enhanching mixing at the microscale. It is found that oscillatory flow developed above a critical Reynolds number in the wake of a post is weakly affected by volumetric and surface (catalytic) reactions. The observed reactivity, on the other hand, is strongly affected by flow‐driven instabilities. Based on these results, a novel post micromixer that capitalizes on this oscillatory flow while exhibiting a low pressure drop is proposed. Finally, different feature configurations are investigated to gain insights into the mixing performance and to develop design guidelines. © 2005 American Institute of Chemical Engineers AIChE J, 2005

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