Details

Autor(en) / Beteiligte

• Hernández-Delfin, D
• Weinhart, T
• Hidalgo, R. C

Titel

Self-diffusion of spherocylindrical particles flowing under non-uniform shear rate

Ist Teil von

• Soft matter, 2022-05, Vol.18 (17), p.3335-3341

Ort / Verlag

England: Royal Society of Chemistry

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• This work is devoted to study numerically the self-diffusion of spherocylindrical particles flowing down an inclined plane, using the discrete element method (DEM). This system is challenging due to particles being non-spherical and because they are subjected to a non-uniform shear rate. We performed simulations for several aspect ratios and inclination angles, tracking individual particle trajectories. Using the simulation data, we computed the diffusion coefficients D , and a coarse-graining methodology allowed accessing the shear rate spatial profiles &z.ggrda; ( z ). This data enabled us to identify the spatial regions where the diffusivity strongly correlates with the local shear rate. Introducing an effective particle size d , we proposed a well-rationalized scaling law between D and &z.ggrda; . Our findings also identified specific locations where the diffusivity does not correlate with the shear rate. This observation corresponds to zones where &z.ggrda; has non-linear spatial variation, and the velocity probability density distributions exhibit asymmetric shapes. This work is devoted to study numerically the self-diffusion of spherocylindrical particles flowing down an inclined plane, using the discrete element method (DEM).