Cross-Stream Migration of Flexible Molecules in a Nanochannel

Rajesh Khare, Michael D. Graham, and Juan J. de Pablo
Phys. Rev. Lett. 96, 224505 – Published 8 June 2006

Abstract

Molecular dynamics simulations are used to examine the cross-stream chain migration phenomenon in dilute polymer solutions that are flowing in nanochannels. In particular, both uniform planar shear (Couette) and pressure driven (Poiseuille) flows of a dilute polymer solution are studied using a bead-spring representation of polymer chains and a coarse grained model for the solvent. Our results show that three mechanisms govern the migration of deformable molecules in a nanochannel: (1) chain-wall hydrodynamic interactions, (2) thermal diffusion, and (3) gradient in chain mobility. These results are discussed in the context of recent experimental, numerical and theoretical work.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 13 December 2005

DOI:https://doi.org/10.1103/PhysRevLett.96.224505

©2006 American Physical Society

Authors & Affiliations

Rajesh Khare*, Michael D. Graham, and Juan J. de Pablo

  • Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706-1691, USA

  • *Present address: Department of Chemical Engineering, Texas Tech University, P.O. Box 43121, Lubbock, TX 79409-3121, USA

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 96, Iss. 22 — 9 June 2006

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×