Numerical and Experimental Study on Mixing in Chaotic Micromixers with Crossing Structures. Issue 9 (30th June 2020)

• Record Type: Journal Article
• Authors: Fuwad, Ahmed; Hossain, Shakhawat; Ryu, Hyunil; Ansari, Mubashshir Ahmad; Khan, Muhammad Saiful Islam; Kim, Kwang-Yong; Jeon, Tae-Joon; Kim, Sun Min
• Is Part Of: Chemical engineering & technology. Volume 43:Issue 9(2020)
• Page Start: 1866
• Page End: 1875
• Publication Date: 2020-06-30
• Subjects: Chaotic micromixer -- Crossing structures -- Mixing performance -- Navier‐Stokes equations; Chemical engineering -- Periodicals; Chemical processes -- Periodicals; 660.05
• DOI: 10.1002/ceat.201900523
• Languages: English
• ISSNs: 0930-7516

Abstract

Abstract: Two chaotic micromixers (Models A and B) based on the split‐and‐recombine principle using multilayer microchannels are proposed and the mixing performance was analyzed numerically and experimentally for a wide range of Reynolds numbers. The fluid flow and mixing performance were numerically analyzed by solving Navier‐Stokes equations. Micromixers were fabricated using a soft‐lithography technique. As working fluids, water and a dye/water mixture were used. Quantitative and qualitative analyses were performed using confocal scanning microscopy and image processing techniques. The micromixers could enhance the mixing performance by expanding the interfaces between the working fluids to be mixed. The results confirm the superior mixing index of Model B compared to that of Model A. Abstract : Experimental and numerical analyses were performed for two new chaotic micromixers, analyzing the mixing index and flow structures at Reynolds numbers varying from 1 to 220. Confocal fluorescence microscopic images were taken at different positions along the length and depth of the channel to examine the fluid flow fields. Good matching of the numerical with the experimental results was confirmed.