Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bacterial floc mediated rapid streamer formation in creeping flows   One of the central puzzles concerning the interaction of low Reynolds number
(Re<<1) fluid transport with bacterial biomass is the formation of filamentous
structures called streamers. In this manuscript, we report our discovery of a
new kind of low Re bacterial streamers, which appear from pre-formed bacterial
flocs. In sharp contrast to the biofilm-mediated streamers, these streamers
form over extremely small timescales (less than a second). Our experiments,
carried out in a microchannel with micropillars rely on fluorescence microscopy
techniques to illustrate that floc-mediated streamers form when a freely-moving
floc adheres to the micropillar wall and gets rapidly sheared by the background
flow. We also show that at their inception the deformation of the flocs is
dominated by recoverable large strains indicating significant elasticity. These
strains subsequently increase tremendously to produce filamentous streamers.
Interestingly, we find that these fully formed streamers are not static
structures and show viscous response at time scales larger than their formation
time scales. Finally we show that such novel streamer formation can lead to
rapid clogging of microfluidic devices.

26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
6
The categories of this paper are: astro-ph
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn