We numerically investigate the transport of a Brownian colloidal particle in a square array of planar counter-rotating convection rolls at high Peclet numbers. We show that an external force produces huge excess peaks of the particle's diffusion constant with a height that depends on the force orientation and intensity. In sharp contrast, the particle's mobility is isotropic and force independent. We relate such a nonlinear response of the system to the advection properties of the laminar flow in the suspension fluid.
Anisotropic Diffusion in Driven Convection Arrays
Marchesoni, F
;
2021-01-01
Abstract
We numerically investigate the transport of a Brownian colloidal particle in a square array of planar counter-rotating convection rolls at high Peclet numbers. We show that an external force produces huge excess peaks of the particle's diffusion constant with a height that depends on the force orientation and intensity. In sharp contrast, the particle's mobility is isotropic and force independent. We relate such a nonlinear response of the system to the advection properties of the laminar flow in the suspension fluid.File in questo prodotto:
File | Dimensione | Formato | |
---|---|---|---|
entropy-23-00343-v3.pdf
accesso aperto
Tipologia:
Versione Editoriale
Licenza:
PUBBLICO - Creative Commons
Dimensione
3.84 MB
Formato
Adobe PDF
|
3.84 MB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.