Entwicklung optischer Feldmessverfahren zur Charakterisierung mikrofluidischer Mischungsvorgänge

Development of optical 2d measuring methods for characterisation of microfluidic mixing processes

by Karsten Roetmann
Doctoral thesis
Date of Examination:2008-03-28
Date of issue:2008-05-09
Advisor:Dr. Volker Beushausen
Referee:Prof. Dr. Werner Lauterborn
Referee:Prof. Dr. Gerd Marowsky
Persistent Address: http://dx.doi.org/10.53846/goediss-3457

 

 

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Abstract

English

The two dimensional Molecular Tagging Velocimetry (2D-MTV) is used to measure velocity fields of the flow in a micro mixer. Instead of commonly used micro particles an optical tagging of the flow is performed by using a caged dye. The pattern generation is done by imaging a mask for the first time. This allows to generate nearly any imaginable pattern. The flow induces a deformation of the optically written pattern that can be tracked by laser induced fluorescence. The series of raw images acquired in this way are analyzed quantitatively with a novel optical flow based technique. Reference measurements have been carried out allowing to draw conclusions about the accuracy of this procedure. A comparison to the standard technique of
Keywords: micro fluidic; MTV; optical flow; Raman; concentration distribution
Schlagwörter: Mikrofluidik; MTV; optischer Fluss; Raman; Konzentrationsverteilung
 
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