Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session M40: DFD IV
8:00 AM–10:48 AM,
Wednesday, March 6, 2024
Room: 103F
Sponsoring
Unit:
DFD
Chair: Patrick Comiskey, Milwaukee School of Engineering
Abstract: M40.00007 : Control of viscoelastic instabilities by symmetry in microfluidic channels*
9:12 AM–9:24 AM
Presenter:
Enrico Turato
(Lund Univ/Lund Inst of Tech)
Authors:
Enrico Turato
(Lund Univ/Lund Inst of Tech)
Jason P Beech
(Lund University)
Jonas O Tegenfeldt
(Lund University)
Oskar E Ström
(Lund University)
Enhanced mixing is demonstrated at low Reynolds numbers using these waves by introducing DNA stained with different colors for each of two inlets in the microfluidic device. We observe the waves using epi-fluorescence microscopy and quantify the mixing by the overlap of the two DNA samples as they flow along the channel. We also quantify the mixing of the aqueous solvent by monitoring the change in fluorescence of an ion sensitive dye that is added to one of the DNA samples while a monovalent ion is added to the other sample.
Efficient suppression of the viscoelastic fluctuations is realized by alternating every second row in the pillar array, thereby creating a situation where a LEFT wave is initiated immediately followed by a RIGHT wave that neutralizes it.
*Device fabrication took place at Lund NanoLab. We thank Stiftelsen Hästforskning and NanoLund at Lund University for financial support.
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700