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Inertial focusing of non-spherical microparticles
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) (a) Device design and schematic showing inertial forces, namely, the wall effect, FLW, and the shear-gradient lift, FLS, acting on microparticles, resulting in different average lateral equilibrium positions, Xeq. High-speed microscopic images of (b) spheres and symmetric disks, (c) cylinders with various cross-sections and aspect ratios, and (d) an asymmetric doublet and h-shaped disk.

Image of FIG. 2.
FIG. 2.

(Color online) Flow rate and rotational diameter affect inertial focusing. (a) Behavior of flowing cylindrical particles at 4.5 cm downstream varied as flow rate increased. (b) Microparticles with various shapes can be inertially focused at uniform lateral and vertical locations at Rc = 200. Regardless of cross-sectional shape or aspect ratio, all particles followed the focusing trend of spheres with similar Dmax except for asymmetric disks with an h-shaped cross-section.

Image of FIG. 3.
FIG. 3.

(Color online) Rotational behavior of doublets with various size and asymmetry. (a) Nondimensionalized rotational period of doublets, , and (b) the period ratio, Ts/Tp, were strongly dependent on Dmax and independent of AR (inset (a)). Inset (b): definition of Ts/Tp. Here, α is the magnitude of the angular acceleration of the doublet.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Inertial focusing of non-spherical microparticles