Local details versus effective medium approximation: A study of diffusion in microfluidic random networks made from Voronoi tessellations.

  title={Local details versus effective medium approximation: A study of diffusion in microfluidic random networks made from Voronoi tessellations.},
  author={Washington Ponce and Mar{\'i}a Luisa Cordero},
  journal={Physical review. E},
  volume={101 2-1},
We measured the effective diffusion coefficient in regions of microfluidic networks of controlled geometry using the fluorescence recovery after photobleaching (FRAP) technique. The geometry of the networks was based on Voronoi tessellations, and had varying characteristic length scale and porosity. For a fixed network, FRAP experiments were performed in regions of increasing size. Our results indicate that the boundary of the bleached region, and in particular the cumulative area of the… 
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