Micromixers based on molecular diffusion - Micromixers Fundamentals Design and Fabrication - page 185

concept. Switching of solvent and solute streams was realized by piezoelectric valves. Figure 5.17
compares the measured concentration distribution from [29] with the above analytical model. It is
obvious that the assumption of the effective diffusion coefficient D * can describe axial transport
relatively well.
FIGURE 5.17
Concentration distribution of the mixing concept based on hydrodynamic focusing and sequential segmentation:
(a) f ¼ 1 Hz, Pe ¼ 68, 587 and (b) f ¼ 2 Hz, Pe ¼ 34, 294.