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Silicon Microstructures for High Throughput Mixing Devices

[+] Author Affiliations
Norbert Kockmann, Thomas Kiefer, Michael Engler, Peter Woias

Albert-Ludwig University of Freiburg, Freiburg, Germany

Paper No. ICMM2005-75125, pp. 303-308; 6 pages
  • ASME 3rd International Conference on Microchannels and Minichannels
  • ASME 3rd International Conference on Microchannels and Minichannels, Part B cont’d
  • Toronto, Ontario, Canada, June 13–15, 2005
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4185-5 | eISBN: 0-7918-3758-0
  • Copyright © 2005 by ASME


Convective mixing in microstructures gives good mixing results in a very short time. In this work a theoretical and experimental study was performed on convective micro mixing in different mixing structures and their combinations. Various mixing elements had been integrated on a silicon chip to achieve a device for a high mass flow above 15 kg/h. These test structures were fabricated and tested concerning their flow behavior and mixing characteristics. Flow measurements with pH neutralisation and indication by Bromothymol Blue confirm the numerical simulations of the flow characteristics and mixing behaviour. The integral mixing quality in the micro mixer is measured with the iodide-iodate-reaction (Villermaux-Dushman) and shows excellent values for high Re numbers. This opens the potential of microstructures for new applications in the production of chemicals.

Copyright © 2005 by ASME



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