Excess Diffusion of a Driven Colloidal Particle in a Convection Array
We numerically investigate the transport of a passive colloidal particle in a periodic array of planar counter-rotating convection rolls, at high Péclet numbers. It is shown that an external bias, oriented parallel to the array, produces a huge excess diffusion peak, in cases where bias and advectio...
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Veröffentlicht in: | Chinese physics letters 2021-05, Vol.38 (4), p.40501-21 |
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Hauptverfasser: | , , , , |
Format: | Artikel |
Sprache: | eng |
Online-Zugang: | Volltext |
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Zusammenfassung: | We numerically investigate the transport of a passive colloidal particle in a periodic array of planar counter-rotating convection rolls, at high Péclet numbers. It is shown that an external bias, oriented parallel to the array, produces a huge excess diffusion peak, in cases where bias and advection drag become comparable. This effect is not restricted to one-dimensional convection geometries, and occurs independently of the array’s boundary conditions. |
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ISSN: | 0256-307X 1741-3540 |
DOI: | 10.1088/0256-307X/38/4/040501 |