title: Smoothed particle hydrodynamics: Applications to migration of radionuclides in confined aqueous systems.
abstract: A smoothed particle hydrodynamics (SPH) model is presented for simulating the decay chain transport of radionuclides in confined aqueous solutions. The SPH formulation is based on the open-source parallel code DualSPHysics extended to solve the advective-diffusion equation for the evolution of the concentration field coupled to the fluid-dynamic equations, including the effects of radioactive decay of the tracer contaminants. The performance of the method is demonstrated for environmental engineering problems dealing with the transport of contaminants in still and flowing water. The results from a series of benchmark test calculations are described in two- and three-space dimensions, where the advection, diffusion, and radioactive decay modes are tested separately and in combined form. The accuracy of the present SPH transport model is shown by direct comparison with the analytical solutions and results from other SPH approaches. For a given problem, convergence of the SPH solution is seen to increase with decreasing particle size and spacing.
authors.affiliation: Departamento de Física, Instituto Nacional de Investigaciones Nucleares (ININ), Carretera México-Toluca S/N, La Marquesa, 52750 Ocoyoacac, Estado de México, México. Electronic address: estela.mayoral@inin.gob.mx.
authors.forename: Estela
authors.initials: E
authors.lastname: Mayoral-Villa
authors.affiliation: Departamento de Ingeniería Química, DCNyE, Universidad de Guanajuato, Noria Alta S/N, 36000 México, Guanajuato, México; ABACUS-Centro de Matemáticas Aplicadas y Cómputo de Alto Rendimiento, Departamento de Matemáticas, Centro de Investigación y de Estudios Avanzados CINVESTAV-IPN, Carretera México-Toluca Km 38.5, La Marquesa, Ocoyoacac, Estado de México, 52740 México. Electronic address: q_l_o@hotmail.com.
authors.forename: Carlos E
authors.initials: CE
authors.lastname: Alvarado-Rodríguez
authors.affiliation: Departamento de Física, Instituto Nacional de Investigaciones Nucleares (ININ), Carretera México-Toluca S/N, La Marquesa, 52750 Ocoyoacac, Estado de México, México; ABACUS-Centro de Matemáticas Aplicadas y Cómputo de Alto Rendimiento, Departamento de Matemáticas, Centro de Investigación y de Estudios Avanzados CINVESTAV-IPN, Carretera México-Toluca Km 38.5, La Marquesa, Ocoyoacac, Estado de México, 52740 México. Electronic address: jaime.klapp@inin.gob.mx.
authors.forename: Jaime
authors.initials: J
authors.lastname: Klapp
authors.affiliation: EPhysLab (Environmental Physics Laboratory), Facultad de Ciencias, Campus de Ourense, Universidad de Vigo, 32004 Ourense, Spain. Electronic address: mggesteira@uvigo.es.
authors.forename: Moncho
authors.initials: M
authors.lastname: Gómez-Gesteira
authors.affiliation: Área de Física de Procesos Irreversibles, Departamento de Ciencias Básicas, Universidad Autónoma Metropolitana-Azcapotzalco (UAM-A), Av. San Pablo 180, 02200 México D.F., México; Centro de Física, Instituto Venezolano de Investigaciones Científicas, IVIC, Apartado Postal 20632, Caracas 1020-A, Venezuela. Electronic address: leonardo.sigalotti@gmail.com.
authors.forename: Leonardo Di G
authors.initials: LD
authors.lastname: Sigalotti
mesh_terms: D004058:Diffusion; D057446:Hydrodynamics; D062070:Hydrology / Q000379:methods*; D008962:Models, Theoretical; D011868:Radioisotopes / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis; D014875:Water Pollutants, Radioactive / Q000032:analysis*
chemical_list: D011868:Radioisotopes; D014874:Water Pollutants, Chemical; D014875:Water Pollutants, Radioactive
keywords: Advective-diffusion; Contaminant transport; Diffusion; Radioactive decay chain transport; Smoothed particle hydrodynamics (SPH)