| Title |
Confined flows of a polymer microgel
|
|---|---|
| Published in |
The European Physical Journal E, March 2013
|
| DOI | 10.1140/epje/i2013-13030-3 |
| Pubmed ID | |
| Authors |
Baudouin Geraud, Lyderic Bocquet, Catherine Barentin |
| Abstract |
In this paper, we probe the influence of confinement on the flows of a polymer microgel, namely Carbopol. We compare its bulk rheological behavior, measured with a rheometer and well described by a Hershel-Bulkley law, to velocity profiles measured in rough microchannels, obtained with a particle tracking velocimetry technique. We show a strong disagreement between the bulk prediction for the velocity profiles and the measured ones in the microchannels. Velocity profiles in confined conditions are successfully analyzed within the framework of a non-local fluidity model introduced recently (J. Goyon et al. Nature, 454, 84 (2008)). This allows to determine a cooperativity length ξ, whose order of magnitude compares with the structure size of the microgel. Moreover, we measure flow curves using a rheometer for different gap conditions and also show that this set of data exhibit a strong effect of the confinement on the measured rheological properties. This is again characterized by a typical length of the same order as the cooperativity length scale ξ. We thus evidence confinement effects with two complementary experiments which both give the same typical length for the rearrangements in the flows. |
Mendeley readers
The data shown below were compiled from readership statistics for 71 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| France | 4 | 6% |
| Unknown | 67 | 94% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 20 | 28% |
| Researcher | 13 | 18% |
| Student > Doctoral Student | 8 | 11% |
| Student > Master | 6 | 8% |
| Professor | 5 | 7% |
| Other | 11 | 15% |
| Unknown | 8 | 11% |
| Readers by discipline | Count | As % |
|---|---|---|
| Physics and Astronomy | 20 | 28% |
| Engineering | 15 | 21% |
| Chemical Engineering | 11 | 15% |
| Materials Science | 7 | 10% |
| Chemistry | 5 | 7% |
| Other | 3 | 4% |
| Unknown | 10 | 14% |
Attention Score in Context
This research output has an Altmetric Attention Score of 8. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 30 April 2013.
All research outputs
#3,929,049
of 23,498,099 outputs
Outputs from The European Physical Journal E
#134
of 650 outputs
Outputs of similar age
#32,703
of 199,467 outputs
Outputs of similar age from The European Physical Journal E
#5
of 7 outputs
Altmetric has tracked 23,498,099 research outputs across all sources so far. Compared to these this one has done well and is in the 82nd percentile: it's in the top 25% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 650 research outputs from this source. They typically receive more attention than average, with a mean Attention Score of 8.0. This one has done well, scoring higher than 79% of its peers.
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