The master's thesis deals with the mixing process in various designs of microfluidic devices used for passive mixing. Experimental analysis was performed using Particle Image Velocimetry on five different designs of microchannels in microfluidic devices for mixing two fluids. The method of 3D photopolymer printing and PDMS silicone casting was used to manufacture microfluidic devices. The thesis includes the development of the technology used for manufacturing microfluidic devices, a review of the literature in the field of microchannels, CAD modeling of microfluidic devices, development of a test bed for experimental testing using an imaging method for tracking fluorescent particles, performance of tests on an experimental setup, analysis and presentation of results, including the visualization of the vector field of velocity magnitude and vorticity in microchannels, and the final results for the mixing efficiency in five different designs of microchannels for mixing two different fluids.
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