Publikation:

Measurement of permeability of microfluidic porous media with finite-sized colloidal tracers

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Scholz_0-411311.pdf
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2012

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Scholz, Christian
Wirner, Frank
Li, Yujie

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http://nbn-resolving.de/urn:nbn:de:bsz:352-0-411311
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https://doi.org/10.1007/s00348-012-1362-9
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Experiments in Fluids. 2012, 53(5), pp. 1327-1333. ISSN 0723-4864. eISSN 1432-1114. Available under: doi: 10.1007/s00348-012-1362-9

Zusammenfassung

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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ISO 690SCHOLZ, Christian, Frank WIRNER, Yujie LI, Clemens BECHINGER, 2012. Measurement of permeability of microfluidic porous media with finite-sized colloidal tracers. In: Experiments in Fluids. 2012, 53(5), pp. 1327-1333. ISSN 0723-4864. eISSN 1432-1114. Available under: doi: 10.1007/s00348-012-1362-9
BibTex
@article{Scholz2012-11Measu-39289,
  year={2012},
  doi={10.1007/s00348-012-1362-9},
  title={Measurement of permeability of microfluidic porous media with finite-sized colloidal tracers},
  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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