A generalized model for dense axisymmetric grains flow with orientational diffusion
Date
2022
Authors
Amereh, Meitham
Nadler, Ben
Journal Title
Journal ISSN
Volume Title
Publisher
Journal of Fluid Mechanics
Abstract
The flow of non-spherical grains is strongly affected by the orientation of the grains, as
observed in experiments and simulations. An existing model that predicts the orientation
of grains as a function of the flow field and shape of the grains, is limited to
homogenous orientational fields where the interaction of the grains with their surroundings
is negligible. To address this limitation, we generalized the model to account for
inhomogeneous orientational fields in the form of spatial non-convective orientational
flux. The orientational flux accounts for the interactions of grains with their surroundings
and the boundaries. The proposed model is used to study the influence of orientational
diffusion and boundary conditions on the flow of dense granular material down an incline.
It is shown that the boundary conditions can play a significant role in the orientation of
grains in such flows.
Description
Keywords
dry granular material
Citation
Amereh, M. & Nadler, B. (2022). “A generalized model for dense axisymmetric grains flow with orientational diffusion.” Journal of Fluid Mechanics, 936, A40. https://doi.org/10.1017/jfm.2022.44