(142bw) Force Driven Separation of Particles and Drops by Deterministic Lateral Displacement
AIChE Annual Meeting
2012
2012 AIChE Annual Meeting
Engineering Sciences and Fundamentals
Fluid Mechanics Poster Session
Monday, October 29, 2012 - 3:15pm to 5:45pm
We present the separation of solid particles and drops in force-driven deterministic lateral displacement (f-DLD), a promising high-throughput continuous separation method in microfluidics. We perform both macroscopic experiments in scaled up systems as well as microfluidic experiments. The solid particles or drops are driven through a square array of cylindrical obstacles and, for some forcing orientations, they migrate in different directions. These experiments demonstrate the separation capabilities —and provide constraints for the design— of f-DLD for particles and drops of multiple sizes. We show that in all cases the trajectories of the particles follow selected locking directions in the lattice and present a simple collision model, based on particle-obstacle repulsive interactions, that accurately describes the trajectories of the particles for all forcing directions. Finally, we also demonstrate that a single line of cylindrical obstacles rotated with respect to the driving force is capable of performing binary separations. Using scaled up models proved to be a succesful approach to capture the behavior of microfluidic systems and test the deterministic limit.
See more of this Session: Fluid Mechanics Poster Session
See more of this Group/Topical: Engineering Sciences and Fundamentals
See more of this Group/Topical: Engineering Sciences and Fundamentals