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Abstract
Many microfluidic applications require the
mixing of reagents, but efficient mixing in these laminar systems
remains a challenge. In this paper, we consider further the method
of pulsed flow mixing
which takes advantage of
time dependency rather than spatial complexity. In particular,
using computational fluid dynamics (CFD) we analyze the dynamics
of the flow when the two inlets are pulsed at $90^\circ$ and
$180^\circ$ out of phase. Both cases achieve enhanced mixing
although better results occur in the first case. This is apparent
in the concentration level plots as well as in the shape of
material lines which show strong repeated stretching and folding
at the confluence region.
Mathematics Subject Classification: Primary:58F15, 58F17; Secondary: 53C35.
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