Colloids in active fluids: Anomalous micro-rheology and negative drag

Details Colloids in active fluids: Anomalous micro-rheology and negative drag Colloids in active fluids: Anomalous micro-rheology and negative drag

2012-04-05

arxiv.org/abs/1204.1279v1

Physics

Condensed Matter

Soft Condensed Matter

5 pages, 3 figures

Scientific paper

We simulate an experiment in which a colloidal probe is pulled through an active nematic fluid. We find that the drag on the particle is non-Stokesian (not proportional to its radius). Strikingly, a large enough particle in contractile fluid (such as an actomyosin gel) can show negative viscous drag in steady state: the particle moves in the opposite direction to the externally applied force. We explain this, and the qualitative trends seen in our simulations, in terms of the disruption of orientational order around the probe particle and the resulting modifications to the active stress.

Affiliated with

Also associated with

No associations

Rating

Colloids in active fluids: Anomalous micro-rheology and negative drag 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 Colloids in active fluids: Anomalous micro-rheology and negative drag, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Colloids in active fluids: Anomalous micro-rheology and negative drag will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-213171