Experiments in Fluids

, Volume 53, Issue 5, pp 1327–1333 | Cite as

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

  • Christian ScholzEmail author
  • Frank WirnerEmail author
  • Yujie Li
  • Clemens Bechinger
Research Article


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.


Particle Velocity Microfluidic Device Outer Segment Microfluidic Channel Particle Tracking Velocimetry 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



We would like to thank Valentin Blickle, Hans-Jürgen Kümmerer and Gerd E. Schröder-Turk for inspiring discussions.


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Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  1. 1.Physikalisches InstitutUniversität StuttgartStuttgartGermany

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