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Updated: May 13, 2026

Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics
Published on: August 27, 2013
Visualization and measurements of flows in micro silicon Y-channels
Jostein Kolaas1, Atle Jensen, Michal Mielnik
1Hydrodynamics laboratory, Department of Mathematics, University of Oslo, 0851, Oslo, Norway.
Abstract:
Velocities and accelerations are measured and visualized in silicon microchannels using particle tracking velocimetry (PTV). Both pulsatile and stationary flows are generated in channels with different geometry. Distinct differences between flow regimes and geometries are shown. Flow separation occurred at Re = 84 for the channel with an expanded bifurcation shown by streamlines from long exposed images. Moving least squares are used to find the ensemble-averaged positions of the measured velocities from tracking. This is needed to find the local and convective accelerations.
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