Figure 4 | Scientific Reports

Figure 4

From: Mechanically facilitated micro-fluid mixing in the organ of Corti

Figure 4

Mechanical agitation enhances fluid mixing in a micro-tube. (A) The mixing parameter χ (Eq. 7) increases over time from zero (initial status) to one (completely homogenized). The mechanically agitated cases (drift velocity fields from Figs. 2 and 3) are compared with the case of pure diffusion. (B) The same curves as in (A), but in the log–log scale. The effective ‘mixing time’ was defined as the intercept between the initial tangent line and χ = 1 (red broken lines). Mixing times corresponding to c = 80, 8 m/s and pure diffusion are indicated with different markers on the time-axis. (C) Mixing time decreased as wave-speed or Péclet number (Pe) increased. Pe is defined as \({\stackrel{-}{u}}_{D}h/D\), where \({\stackrel{-}{u}}_{D}\) is the root-mean-square drift velocity over the space. The broken lines are the asymptotes of the mixing time versus Pe curve.

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