Cyclic motion and inversion of surface flow direction in a dense polymer brush under shear

Details Cyclic motion and inversion of surface flow direction in a dense polymer brush under shear Cyclic motion and inversion of surface flow direction in a dense polymer brush under shear

2007-08-30

arxiv.org/abs/0708.4245v1

Physics

Condensed Matter

Soft Condensed Matter

6 pages, 6 figures, submitted for publication

Scientific paper

10.1209/0295-5075/81/28002

Using molecular simulations, we study the properties of a polymer brush in contact with an explicit solvent under Couette and Poiseuille flow. The solvent is comprised of chemically identical chains. We present evidence that individual, unentangled chains in the dense brush exhibit cyclic, tumbling motion and non-Gaussian fluctuations of the molecular orientations similar to the behaviour of isolated tethered chains in shear flow. The collective molecular motion gives rise to an inversion of hydrodynamic flow direction in the vicinity of the brush-coated surface. Utilising Couette and Poiseuille flow, we investigate to what extend the effect of a brush-coated surface can be described by a Navier slip condition.

Affiliated with

Also associated with

No associations

Rating

Cyclic motion and inversion of surface flow direction in a dense polymer brush under shear does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Cyclic motion and inversion of surface flow direction in a dense polymer brush under shear, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cyclic motion and inversion of surface flow direction in a dense polymer brush under shear will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-617599