Fig. 4
From: Supercritical miniaturization of turbulence in microsystems
\(\mu\)PIV raw images showing irregular speckle patterns and turbophoretic effects for cases B and C. (a, c) Speckle patterns (green circles) observed in the recorded images, where distinct optical irregularities replace the normal appearance of individual tracer particles. (b, d) Turbophoretic effects manifested by halos corresponding to quasi-static particles accumulating in the vicinity of the microchannel walls.
