Erratum to: An experimental characterization of a tunable separation device

1 Erratum to: Microfluid Nanofluid (2016) 20:160 DOI 10.1007/s10404-016-1826-y

In the original publication of the article, the sentence “Mean flow is from right to left.” in caption of Fig. 7 was incorrect. The correct caption with Fig. 7 is given below:

Fig.7

Flow layers and u-velocity profiles for the upstream saddle point position for $Re=2.8$ (black), $Re=29$ (blue) and $Re=58$ (red). a Boundary layer thickness $T_{\rm bl}$ (dotted line) and u-velocity profiles (solid lines). $T_{\rm bl}$ is calculated from the shape of the u-velocity profiles. Changes of $T_{\rm bl}$ along the permeable wall are small and within the measurement accuracy. b Boundary layer thickness (dotted lines) and permeate thickness $T_p$ (solid lines). Except far downstream, $T_{\rm bl}$ is smaller than $T_p$. Therefore, if normal forces are to influence the separation of particles, this will occur inside the permeate layer. Mean flow is from left to right. The maximum u-velocity for $Re=58$ is 1.6 times the freestream velocity around a circular cylinder, $U_\infty \cdot \text{ sin }\theta$ (color figure online)

“Mean flow is from right to left.” should be “Mean flow is from left to right.”