@misc{10481/107787,
year = {2025},
month = {5},
url = {https://hdl.handle.net/10481/107787},
abstract = {A continuous formulation and a suitable finite element numerical method are intro-
duced for simulating interactions between fluid flow and evolving bedforms. Sed-
iment transport is modeled by solving the non–equilibrium saltation dynamics of
non-cohesive grains. The approach integrates the Navier–Stokes equations for in-
compressible fluid flow, a conservation equation to track evolution of the fluid–solid
interface, and mass and momentum equations governing sediment dynamics. The
latter conservation laws are depth–integrated over the saltation layer, resulting in a
reduced–dimensional framework that improves computational efficiency. A built–in
explicit procedure enables a straightforward two–way coupling between sediment
and fluid dynamics. To stabilize flow computations and ensure the positivity of
key variables, such as saltation layer density and sediment thickness, the numerical
algorithm is a non–oscillatory finite element method (NFEM); its positive definite
characteristic is essential for flows in combined erodible/non–erodible scenarios.
Numerical experiments assess the model response for transient conditions, includ-
ing wind tunnel environments and sand dune–atmospheric boundary layer interac-
tions. Among other features, test’s setups are designed to explore advantages of
the proposed model under severe transient conditions in comparison with results of
standard saturated flow based models.},
publisher = {American Institute of Physics},
title = {A coupled non–saturated model for cohesionless sediment transport},
doi = {10.1063/5.0273440},
author = {Ortiz Rossini, Pablo Gregorio and Molina Moya, Jorge Antonio and Bravo Pareja, Rafael},
}