Abstract
An active inline mixer suitable for flows at low Reynolds number and high Péclet number is studied. An alternated oscillatory forcing protocol is imposed by three rotating circular arc-walls in a straight channel. In the two-dimensional case, simple phenomenological arguments are used to estimate heuristically the mixing efficiency with two nondimensional control parameters: the Strouhal number based on the bulk flow velocity and the strength of the cross flow relative to the transport flow. The validity and limitations of the proposed mixing conditions are explained by the transport mechanisms in the mixer. The beneficial role of the elliptic flow regions for stretching and folding the passive scalar interfaces is highlighted as well as a correlation between good mixing ability and the chaotic advection of tracers in the mixing zone.
6 More- Received 13 June 2020
- Accepted 28 January 2021
- Corrected 22 March 2021
DOI:https://doi.org/10.1103/PhysRevFluids.6.024502
©2021 American Physical Society
Physics Subject Headings (PhySH)
Corrections
22 March 2021
Correction: The email addresses given in the byline footnotes for the third, fourth, and fifth authors were set improperly during production and have been fixed.