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Artículo
Homogeneous cooling state of a low-density granular flow
(American Physical Society, 1996)
The homogeneous cooling state of a granular flow of smooth spherical particles described by the Boltzmann equation is investigated by means of the direct simulation Monte Carlo method. The velocity moments and also the ...
Artículo
A modeling study of Ra-226 dispersion in an estuarine system in south-west Spain
(Elsevier, 1994)
A numerical model to study 226Ra dispersion in the Odiel River, in which two fertilizer plants release their wastes, has been developed. The hydrodynamic equations have been solved to obtain the instantaneous water state ...
Artículo
Origin of density clustering in a freely evolving granular gas
(American Physical Society, 1999)
The physical mechanisms leading to the development of density inhomogeneities in a freely evolving low density granular gas are investigated. By means of the direct simulation Monte Carlo method, numerical solutions of the ...
Artículo
Three-dimensional modelling of the tidal dispersion of non-conservative radionuclides in the marine environment. Application to 239,240 Pu dispersion in the eastern Irish Sea
(Elsevier, 1999)
A three-dimensional model to simulate the tidal dispersion of non-conservative radionuclides in a marine environment has been developed. The model solves the three-dimensional hydrodynamic equations using normalized s ...
Artículo
Self-diffusion in freely evolving granular gases
(American Institute of Physics, 1994)
A self-diffusionequation for a freely evolving gas of inelastic hard disks or spheres is derived starting from the Boltzmann–Lorentz equation, by means of a Chapman–Enskog expansion in the density gradient of the tagged ...
Artículo
Modelling the dispersion of non-conservative radionuclides in tidal waters .2. Application to Ra-226 dispersion in an estuarine system
(Elsevier, 1996)
The Odiel river is an estuary system located in the south-west of Spain and affected by tidal dynamics. A phosphate fertilizer processing plant releases part of its wastes directly into the Odiel river. The model described ...
Artículo
dc motion of ac driven sine-Gordon solitons
(Elsevier, 1998-10-05)
We investigate the dependence of dc soliton motion sustained by pure ac driving in the sine-Gordon model on various parameter problems, such as frequency, initial kink velocity or relative phase. We show by means of the ...
Artículo
Stability of insulating viscous jets under axial electric fields
(ScienceDirect, 1997-06)
The stability spectrum for a jet of perfectly insulating, viscous liquid subjected to a longitudinal electric field is obtained for axisymmetric perturbations. Both dielectric forces at the interface and viscous dissipation ...
Artículo
210Pb distribution in riverwaters and sediments near phosphate fertilizer factories
(Elsevier, 1996)
two fertilizer factories operate at the estuary formed by the Odiel and Tinto rivers in Southwestern Spain. In previous work the authors have shown that such operation enhances the natural radionuclide background of the ...
Artículo
Radioactive impact of phosphate ore processing in a wet marshland in southwestern Spain
(Elsevier, 1997)
In this paper an extensive study of the presence of natural radionuclides in a marshland area located in the vicinity of a phosphoric acid production complex in southwestern Spain is presented. This marsh is a natural ...