Title

Elastic secondary flows of semidilute DNA solutions in abrupt 90° micro-bends

Document Type

Article

Publication Title

Physical Review E

ISSN

2470-0045

Volume

78

Issue

1

DOI

10.1103/PhysRevE.78.036314

First Page

36314

Publication Date

9-1-2008

Abstract

Secondary flows that are absent in Newtonian flows are found for semidilute λ-DNA solutions in abrupt planar 90° microbends at modest levels of elasticity. Flow visualization and microparticle image velocimetry experiments show that a vortex, which is present in the inner, upstream corner of the bend, grows with increasing Reynolds and Weissenberg number (9.9×10−7−2,0.41

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