Numerical simulation for efficient mixing of newtonian and non-Newtonian fluids in an electro-osmotic micro-mixer

Shamloo, A ; Sharif University of Technology | 2016

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  1. Type of Document: Article
  2. DOI: 10.1016/j.cep.2016.06.003
  3. Publisher: Elsevier , 2016
  4. Abstract:
  5. The present study, deals with a new mixing technique using a two-phase electrode array, which is charged with alternating current (AC) signals, located in specific parts of the geometry. This significantly contributes to a chaotic mixing mechanism using a low amplitude AC voltage within a micro-channel. Study analysis demonstrates that the optimization of the effective parameters such as geometrical features, voltage amplitude, fluid inlet velocity, AC frequency and phase lag for a defined fluid can lead to an optimum and highly efficient mixer by considerably increasing disturbances in a primary highly ordered laminar flow. Three different geometries of micro mixer are studied; one-ring type, diamond type and two-ring type and it is shown that the optimum mixing quality of 99.4, 98 and 99.8% are achievable for them, respectively. Finally all the aforementioned studies have also been done for the case of blood as a biological fluid
  6. Keywords:
  7. Electro osmotic ; Micro-mixer ; Numerical simulation ; Optimum mixing ; Computer simulation ; Electric impedance measurement ; Electroosmosis ; Geometry ; Laminar flow ; Mixers (machinery) ; Mixing ; Non newtonian liquids ; Numerical models ; Osmosis ; Alternating current ; Different geometry ; Effective parameters ; Geometrical features ; Micro mixers ; Mixing techniques ; Non-newtonian fluids ; Non newtonian flow
  8. Source: Chemical Engineering and Processing: Process Intensification ; Volume 107 , 2016 , Pages 11-20 ; 02552701 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0255270116301453