Dramatic change of the self-diffusions of colloidal ellipsoids by hydrodynamic interactions in narrow channels
Abstract
The self-diffusion problem of Brownian particles under the constraint of quasi-one-dimensional (q1D) channel has raised wide concern. The hydrodynamic interaction (HI) plays an important role in many practical problems and two-body interactions remain dominant under q1D constraint. We measure the diffusion coefficient of individual ellipsoid when two ellipsoidal particles are close to each other by video-microscopy measurement. Meanwhile, we obtain the numerical simulation results of diffusion coefficient using finite element software. We find that the self-diffusion coefficient of the ellipsoid decreases exponentially with the decrease of their mutual distance X when
- Publication:
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Chinese Physics B
- Pub Date:
- July 2019
- DOI:
- 10.1088/1674-1056/28/7/074701
- Bibcode:
- 2019ChPhB..28g4701L
- Keywords:
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- hydrodynamic interaction;
- self-diffusion;
- ellipsoids;
- channel