Bulletin of the American Physical Society
APS March Meeting 2018
Volume 63, Number 1
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session X57: Physics of Bioinspired Soft Materials I
8:00 AM–11:00 AM,
Friday, March 9, 2018
LACC
Room: 518
Sponsoring
Units:
GSOFT DBIO
Chair: Kyoo-Chul Park, Northwestern Univ
Abstract ID: BAPS.2018.MAR.X57.8
Abstract: X57.00008 : Enhanced microorganism swimming in active matter*
9:48 AM–10:00 AM
Presenter:
Harsh Soni
(School of Engineering, Brown University)
Authors:
Harsh Soni
(School of Engineering, Brown University)
Robert Pelcovits
(Department of Physics, Brown University)
Thomas Powers
(School of Engineering, Brown University)
Collaboration:
harsh soni
swimming dynamics of micro-organisms modeled as a Taylor sheet or squirmer in the isotropic
phase of an active nematic liquid crystal. The activity changes the effective viscosity of the fluid,
reducing it to zero at a critical value of activity [Hatwalne et al., Phys. Rev. Lett. 92, 1181018
(2004)]. We find that the correction to the swimming speed due to the presence of active nematic
molecules is inversely proportional to the viscosity. Thus the swimming speed diverges at the critical
value of the activity, though the correction for the passive nematic liquid crystal is negligibly small
for the parameter range belonging to the real experiments.
*This work was supported in part by National Science
Foundation Grant No. CBET-1437195 and National Science Foundation Grant MRSEC-1420382.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.MAR.X57.8
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