Type of Publication: | Journal article |
Publication status: | Published |
URI (citable link): | http://nbn-resolving.de/urn:nbn:de:bsz:352-0-411311 |
Author: | Scholz, Christian; Wirner, Frank; Li, Yujie; Bechinger, Clemens |
Year of publication: | 2012 |
Published in: | Experiments in Fluids ; 53 (2012), 5. - pp. 1327-1333. - ISSN 0723-4864. - eISSN 1432-1114 |
DOI (citable link): | https://dx.doi.org/10.1007/s00348-012-1362-9 |
Summary: |
We present two methods how the permeability in porous microstructures can be experimentally obtained from particle tracking velocimetry of finite-sized colloidal particles suspended in a liquid. The first method employs additional unpatterned reference channels where the liquid flow can be calculated theoretically and a relationship between the velocity of the particles and the liquid is obtained. The second method takes advantage of a time-dependent pressure drop that leads to an exponential decrease in the particle velocity inside a porous structure. From the corresponding decay time, the permeability can be calculated independently of the particle size. Both methods lead to results comparable with permeabilities derived from numerical simulations.
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Subject (DDC): | 530 Physics |
Link to License: | In Copyright |
SCHOLZ, Christian, Frank WIRNER, Yujie LI, Clemens BECHINGER, 2012. Measurement of permeability of microfluidic porous media with finite-sized colloidal tracers. In: Experiments in Fluids. 53(5), pp. 1327-1333. ISSN 0723-4864. eISSN 1432-1114. Available under: doi: 10.1007/s00348-012-1362-9
@article{Scholz2012-11Measu-39289, title={Measurement of permeability of microfluidic porous media with finite-sized colloidal tracers}, year={2012}, doi={10.1007/s00348-012-1362-9}, number={5}, volume={53}, issn={0723-4864}, journal={Experiments in Fluids}, pages={1327--1333}, author={Scholz, Christian and Wirner, Frank and Li, Yujie and Bechinger, Clemens} }
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