Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/76453
Type: | Conference paper |
Title: | Particle packing structure in a rectangular micro-capillary |
Author: | Navvab Kashani, S. Zivkovic, V. Alwahabi, Z. Biggs, M. |
Citation: | Proceedings of CHEMECA 2012: quality of life through chemical engineering, held in Wellington, New Zealand, 23-26 September, 2012: pp.37-42 |
Publisher: | Engineers Australia |
Publisher Place: | online |
Issue Date: | 2012 |
ISBN: | 9781922107596 |
Conference Name: | CHEMECA (2012 : Wellington NZ) |
Statement of Responsibility: | M. Navvab Kashani, V. Zivkovic, Z. Alwahabi and M.J. Biggs |
Abstract: | Packed beds of micro-sized particles may be used for enhancing heat and mass transfer in microfluidic devices where Reynolds numbers are small. By increasing the surface area per unit volume, such micro-packed beds can also be used to significantly enhance the functionality of such devices. As the effectiveness of a packed bed is dictated by its packing structure, it is of interest to understand this structure and how it is affected by system parameters such as the channel-to-particle ratio - this has received little attention for micro-packed beds. In the work reported here, X-ray micro-computed tomography and image analysis is used to determine the packing structure of micro-packed beds of glass particles for channel-to-particle ratios of 5.19, 5.80, 6.56 and 7.55 in a channel of D = 200 mum square cross-section. The bed-average porosity was found to be far higher than macroscale PBs, vary from approximately 67% to 60% as the channel-to-particle ratio increased, with the packing structure and porosity varying both across the bed width and along its length. The former clearly arises from the effect of the wall, whilst the latter arises from the sedimentation method used to create the packed bed. |
Keywords: | Tomography sedimentation and deposition microfluidic devices three-dimensional imaging x-ray microanalysis |
Rights: | © 2012 Engineers Australia |
Published version: | http://search.informit.com.au/documentSummary;dn=855857877570991;res=IELENG |
Appears in Collections: | Aurora harvest Chemical Engineering publications Environment Institute publications |
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.