Bulletin of the American Physical Society
APS March Meeting 2018
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session F46: General Fluid Dynamics
11:15 AM–1:27 PM,
Tuesday, March 6, 2018
LACC Room: 506
Sponsoring Unit: DFD
Chair: Parisa Mirbod, Clarkson Univ
Abstract: F46.00003 : Inertial Focusing in Triangular Cross-sectional Microchannel with Varying vertex angle and a/H.
11:39 AM–11:51 AM
Inertial microfluidics provides high-throughput, passive micro-particle manipulation methods which are widely used for various biomedical applications. We examined inertial focusing in isosceles triangular channels having various vertex angle (45°, 60°, 90°, 120°) and dimension with varying Reynolds number by changing flow rate. In particular, we investigated the top focusing positions shifting as a function of Re and a/H (a=particle diameter, H=hydraulic diameter). In case of 90° channels, the total number of focusing positions were changed from two to three as the Re is increased or a/H is decreased. Interestingly, three focusing positions become five in case of 120° triangular channel under high Re or low a/H conditions. The direction of shifting is differed whether vertex angle is acute or obtuse. Equilateral triangular channels do not show much changes due to 120° rotational symmetry. These results suggest various applications for particle manipulation and the understanding of roles of different lift forces.
Editorial Office 1 Research Road, Ridge, NY 11961-2701 (631) 591-4000
Office of Public Affairs 529 14th St NW, Suite 1050, Washington, D.C. 20045-2001 (202) 662-8700