FIG. 6.

(a) Contour of WSS magnitude at the bottom plane of the SoC model, computed numerically. WSS contours are reported at three hydrodynamic regions of interest within the model (Hole 1, Hole 2, and Cavity), together with the corresponding microscope images showing accumulation of encrusting deposits. Experiments were run at an inlet flow rate of 1 ml/min, using SoC devices with wall thickness of (b) 0.3 mm, (c) 0.5 mm, and (d) 0.7 mm. Images were taken at 90 min from the beginning of the experiment (n = 3). Red boxes (with their size underneath them, reported as “width × height” in mm) correspond to the regions over which the percentage area covered by encrustation was calculated.