Bulletin of the American Physical Society
APS March Meeting 2019
Volume 64, Number 2
Monday–Friday, March 4–8, 2019; Boston, Massachusetts
Session L70: Poster Session II (11:15am-2:15pm)
Wednesday, March 6, 2019
BCEC Room: Exhibit Hall
Abstract: L70.00186 : A Method to Measure Drag Coefficient of An Active Particle
H Daniel Ou-Yang
The diffusion is measured by tracking the single-particle motion and calculating the slope of mean squared displacement at long times. An effective temperature, Teff1, can be calculated from diffusion. The particle density distribution in sedimentation is measured by counting the number of particles at different heights in the dilute region, where it obeys Boltzmann distribution with an effective temperature, Teff2. With the assumption that the effective temperatures measured from the two methods are the same, the drag coefficient of ABP could be solved.
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