Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/76454
Type: | Conference paper |
Title: | Importance of surface forces in a micro-fluidized bed |
Author: | Biggs, M. Zivkovic, V. Navvab Kashani, S. Alwahabi, Z. |
Citation: | Proceedings of CHEMECA 2012: quality of life through chemical engineering, held in Wellington, New Zealand, 23-26 September, 2012: pp.698-705 |
Publisher: | Engineers Australia |
Publisher Place: | online |
Issue Date: | 2012 |
ISBN: | 9781922107596 |
Conference Name: | CHEMECA (2012 : Wellington NZ) |
Statement of Responsibility: | M.J. Biggs, V. Zivkovic, M.N. Kashani and Z. Alwahabi |
Abstract: | Fluidized beds (FBs) potentially offer a means of significantly enhancing heat and mass transfer under the low Reynolds number flows that prevail in microfluidic devices. However, as surface forces start to dominate over gravity at the microscale, adhesion of particles to the walls of the micro-FB can prevent fluidization. We used the acid-base theory of van Oss, Chaudhury and Good to understand adhesion forces at the particlewall interface in a micro-FB. This approach, novel to the fluidization field, successfully predicts the adhesion problem in a micro-FB system as verified by our experimental results for liquid fluidization in a typical PDMS microfluidics channel. This demonstrates the importance of considering surface forces in the design of micro-FB, unlike for traditional large FBs where surface forces are often less of an issue. |
Keywords: | Fluidized-bed combusion microfluidic devices mechanical engineering lithography |
Rights: | © 2012 Engineers Australia |
Published version: | http://search.informit.com.au/documentSummary;dn=865509756682739;res=IELENG |
Appears in Collections: | Aurora harvest Chemical Engineering publications Environment Institute publications |
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