131767 20240219150721.0 sideral 109043 ART-2019-109043 eng Morales-Hernández, M. Universidad de Zaragoza (orcid)0000-0001-6961-7250 Diffusion–dispersion numerical discretization for solute transport in 2D transient shallow flows 2019 The 2D solute transport equation can be incorporated into the 2D shallow water equations in order to solve both flow and solute interactions in a coupled system of equations. In order to solve this system, an explicit finite volume scheme based on Roe’s linearization is proposed. Moreover, it is feasible to decouple the solute transport equation from the hydrodynamic system in a conservative way. In this case, the advection part is solved in essence defining a numerical flux, allowing the use of higher order numerical schemes. However, the discretization of the diffusion–dispersion terms have to be carefully analysed. In particular, time-step restrictions linked to the nature of the solute equation itself as well as the numerical diffusion associated to the numerical scheme used are question of interest in this work. These improvements are tested in an analytical case as well as in a laboratory test case with a passive solute (fluorescein) released from a reservoir. Experimental measurements are compared against the numerical results obtained with the proposed model and a sensitivity analysis is carried out, confirming an agreement with the longitudinal coefficients and an underestimation of the transversal ones, respectively. info:eu-repo/grantAgreement/ES/DGA/FSE info:eu-repo/grantAgreement/ES/MINECO/CGL2015-66114-R info:eu-repo/semantics/closedAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 1.512 2019 OCEANOGRAPHY 38 / 66 = 0.576 2019 Q3 T2 MECHANICS 94 / 136 = 0.691 2019 Q3 T3 WATER RESOURCES 65 / 94 = 0.691 2019 Q3 T3 ENVIRONMENTAL SCIENCES 204 / 264 = 0.773 2019 Q4 T3 METEOROLOGY & ATMOSPHERIC SCIENCES 73 / 93 = 0.785 2019 Q4 T3 0.522 2019 Water Science and Technology 2019 Q2 Environmental Chemistry 2019 Q3 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Murillo, J. Universidad de Zaragoza (orcid)0000-0002-1386-5543 García-Navarro, P. Universidad de Zaragoza (orcid)0000-0001-8674-1042 5001 600 Universidad de Zaragoza Dpto. Ciencia Tecnol.Mater.Fl. Área Mecánica de Fluidos 19 (2019), 1217-1234 Environ. Fluid Mech. Environmental Fluid Mechanics 1567-7419 3060207 http://zaguan.unizar.es/record/131767/files/texto_completo.pdf Versión publicada 2053332 http://zaguan.unizar.es/record/131767/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:131767 articulos driver 2024-02-19-13:25:58 ARTICLE