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. 2004 May 10;101(20):7516–7521. doi: 10.1073/pnas.0402433101

Fig. 4.

Fig. 4.

Analysis of mixing efficiency in the serpentine mixer. (A) Light-microscopy images showing mixing of red- and blue-colored liquids at flow rates of 1.1 × 10-2, 1.1 × 10-1, and 5.5 × 10-1 m/sec, from top to bottom, respectively. Images were reconstructed from several imaging fields covering the first six sections of the serpentine mixer. (B) OCT cross-sectional images showing mixing of two liquids with different concentrations of milk in the first part of the mixer. Positions of the cross-sectional images are indicated by the line and the corresponding numbers shown in A. The flow rates are 1.1 × 10-1, 2.2 × 10-1, 4.4 × 10-1, and 6.6 × 10-1 m/sec, from top to bottom, respectively. (C) Degree of mixing at the output indicated with an arrow in A and quantified from light-microscopy (filled diamonds) and OCT (open squares) images. Mixing exhibits an exponential dependence on the Reynolds number based on the light-microscopy image analysis and a linear dependence on the Reynolds number based on OCT image analysis. The images in A and B are not to scale.