Jain, S and Unni, H N
(2016)
Design and Simulation of Microfluidic Passive Mixer With Geometric Variation.
IJRET: International Journal of Research in Engineering and Technology, 5 (2).
pp. 55-58.
ISSN 2319 - 1163
Abstract
Microfluidic designs are advantageous and are extensively used in number of fields related to biomed
ical and biochemical
engineeri
ng. The objective of this paper is to perform numerical simulations to optimize the
design of microfluidic mixers in order
to
achieve optimum mixing. In the present study, fluid mixing in different type of micro channels has b
een investigated. Numeric
al
si
mulations are performed in order to understand the effect of channel geometry parameters on mixing p
erformance. A two
dimensional
“
T shaped
”
passive microfluidic mixer is restructured by employing the rectangular shaped obstacles in the chan
nel
to improve
the mixing performance. The impact of proper placement of obstacles in the channel is demonstrated b
y applying the
leakage concept. It has been observed that, the channel design with non
-
leaky obstacles (i.e. without leaky barriers) has presented
better mi
xing performance in contrast to channel design with leaky obstacles (i.e. leaky barriers) and channe
l design without
obstacles. The mixing occurs by virtue of secondary flow and generation of vortices due to curling o
f fluids in the channel o
n
account of t
he presence of obstacles. This passive mixer has achieved complete mixing of fluids in few seconds o
r some
milliseconds
,
which is certainly acceptable to utilize in biological applications such as cell dynamics, drug scre
ening
,
toxicological screening
and
others.
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