Three-Dimensional Hydrostatic Curved Channel Flow Simulations Using Non-Staggered Triangular Grids.

Zhang, Wei; Uh Zapata, Miguel; Pham Van Bang, Damien ORCID: https://orcid.org/0000-0001-8669-0724 et Nguyen, Kim Dan (2022). Three-Dimensional Hydrostatic Curved Channel Flow Simulations Using Non-Staggered Triangular Grids. Water , vol. 14 , nº 2. p. 174. DOI: 10.3390/w14020174.

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Résumé

Non-staggered triangular grids have many advantages in performing river or ocean modeling with the finite-volume method. However, horizontal divergence errors may occur, especially in large-scale hydrostatic calculations with centrifugal acceleration. This paper proposes an unstructured finite-volume method with a filtered scheme to mitigate the divergence noise and avoid further influencing the velocities and water elevation. In hydrostatic pressure calculations, we apply the proposed method to three-dimensional curved channel flows. Approximations reduce the numerical errors after filtering the horizontal divergence operator, and the approximation is second-order accurate. Numerical results for the channel flow accurately calculate the velocity profile and surface elevation at different Froude numbers. Moreover, secondary flow features such as the vortex pattern and its movement along the channel sections are also well captured.

Type de document:	Article
Mots-clés libres:	non-staggered grids; horizontal divergence oscillations; curved channel flow; free surface; hydrostatic pressure
Centre:	Centre Eau Terre Environnement
Date de dépôt:	09 févr. 2022 15:29
Dernière modification:	09 févr. 2022 15:29
URI:	https://espace.inrs.ca/id/eprint/12245

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