Particle Segregation and Dynamics in Confined Flows

被引：515

作者：

Di Carlo, Dino ^{[1
,2
]}

Edd, Jon F. ^{[1
,2
]}

Humphry, Katherine J. ^{[3
,4
]}

Stone, Howard A. ^{[3
,4
]}

Toner, Mehmet ^{[1
,2
]}

机构：

[1] Shriners Hosp Children, Massachusetts Gen Hosp, Ctr Engn Med & Surg Serv, BioMEMS Resource Ctr, Boston, MA 02114 USA

[2] Harvard Univ, Sch Med, Boston, MA 02114 USA

[3] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[4] Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 09期

关键词：

POISEUILLE FLOW; INERTIAL MIGRATION; REYNOLDS-NUMBER; FRACTIONATION; SEPARATION; SPHERE; LIFT;

D O I：

10.1103/PhysRevLett.102.094503

中图分类号：

O4 [物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Nonlinearity in finite-Reynolds-number flow results in particle migration transverse to fluid streamlines, producing the well-known "tubular pinch effect" in cylindrical pipes. Here we investigate these nonlinear effects in highly confined systems where the particle size approaches the channel dimensions. Experimental and numerical results reveal distinctive dynamics, including complex scaling of lift forces with channel and particle geometry. The unique behavior described in this Letter has broad implications for confined particulate flows.

引用

页数：4

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