Deterministic lateral displacement (DLD) is a continuous, flow-based micro-particle separation method. DLD takes advantage of the laminar nature of the fluid flow in microchannels by directing the small particles along the main streamline of the fluid flow, while laterally displacing larger particles along the axis of the micropillar array. When optimally designed, this simple and energy-efficient method allows a high-resolution separation of particle mixtures carried along by the liquid at high velocity. In this paper, a numerical modeling of fluid flow inside of different DLD devices at different Re numbers is performed. A parametric study is conducted to assess the variation of theoretical critical particle size for various DLD devices. Parameters that affect flow velocity distribution, such as shift fraction and tilt angle are studied. Simulation results show that both micropillar shift fraction and the tilt angle significantly affect the velocity profile within the DLD device. A model is presented to describe the critical diameter for a wide range of pillar-diameter-to-gap-size ratios. The possibility of achieving greater throughput, while preserving flow characteristics and therefore particle separation efficiency, is demonstrated.
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ASME 2013 Fluids Engineering Division Summer Meeting
July 7–11, 2013
Incline Village, Nevada, USA
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-5558-4
PROCEEDINGS PAPER
Numerical Simulation of Fluid Flow in Deterministic Lateral Displacement Devices Available to Purchase
Haidong Feng,
Haidong Feng
University of Utah, Salt Lake City, UT
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Sanja Miskovic
Sanja Miskovic
University of Utah, Salt Lake City, UT
Search for other works by this author on:
Haidong Feng
University of Utah, Salt Lake City, UT
Sanja Miskovic
University of Utah, Salt Lake City, UT
Paper No:
FEDSM2013-16419, V002T21A007; 7 pages
Published Online:
December 13, 2013
Citation
Feng, H, & Miskovic, S. "Numerical Simulation of Fluid Flow in Deterministic Lateral Displacement Devices." Proceedings of the ASME 2013 Fluids Engineering Division Summer Meeting. Volume 2, Fora: Cavitation and Multiphase Flow; Fluid Measurements and Instrumentation; Microfluidics; Multiphase Flows: Work in Progress. Incline Village, Nevada, USA. July 7–11, 2013. V002T21A007. ASME. https://doi.org/10.1115/FEDSM2013-16419
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