2D-Measurement Technique for Simultaneous Quantitative Determination of Mixing Ratio and Velocity Field in Microfluidic Applications

  • Volker Beushausen
  • Karsten Roetmann
  • Waldemar Schmunk
  • Mike Wellhausen
  • Christoph Garbe
  • Bernd Jähne
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume 106)


Two-dimensional Molecular-Tagging-Velocimetry (2D-MTV) has been used to investigate velocity fields of liquid flow in a micro mixer. Optical tagging was realized by using caged dye. For the first time patterns were generated by structured laser illumination using optical masks. This allows the generation of nearly any imaginable pattern. The flow induced deformation of the optically written pattern is tracked by imaging of laser induced fluorescence. Quantitative analysis of raw image series is carried out by novel “optical flow” based techniques. A comparison to the standard technique of μPIV has also been conducted. Additionally Planar Spontaneous Raman Scattering (PSRS) was applied in order to determine concentration fields for mixtures of ethanol and water.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • Volker Beushausen
    • 1
  • Karsten Roetmann
    • 1
  • Waldemar Schmunk
    • 1
  • Mike Wellhausen
    • 1
  • Christoph Garbe
    • 2
  • Bernd Jähne
    • 2
  1. 1.Department of Photonic Sensor TechnologyLaser-Laboratorium Goettingen e.V.GoettingenGermany
  2. 2.Interdisciplinary Center for Scientific ComputingUniversity of HeidelbergHeidelbergGermany

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