NDLI: Two-phase SPH modelling of advective diffusion processes

Content Provider	Springer Nature Link
Author	Aristodemo, Francesco Federico, Ivan Veltri, Paolo Panizzo, Andrea
Copyright Year	2010
Abstract	This paper deals with a two-dimensional numerical model based on the smoothed particle hydrodynamics (SPH) technique for the evaluation of the concentration field of pollutants in water. A SPH model is formulated to solve the fickian diffusion equation applied to pollutants with the same density as the water. A lagrangian SPH formalism of the advective diffusion equation is also developed for pollutant-water, taking into account the effects of molecular diffusion and natural advection induced by differences between the fluid densities. These equations are coupled with the fluid mechanics equations. Attention is paid to the numerical aspects involved in the solution procedure and to the optimization of the model parameters. Environmental engineering problems concerning diffusion and natural advection phenomena occur in the presence of a pollutant in still water. Numerical tests referring to a strip and a bubble of contaminant in a water tank with different initial concentration laws have been carried out. The results obtained by the proposed SPH models are compared with other available SPH formulations, showing an overall better agreement with standard analytical solutions in terms of spatial evolution of the concentration values. Capabilities and limits of the proposed SPH models to simulate advective diffusion phenomena for a wide range of density ratios are discussed.
Starting Page	451
Ending Page	470
Page Count	20
File Format	PDF
ISSN	15677419
Journal	Environmental Fluid Mechanics
Volume Number	10
Issue Number	4
e-ISSN	15731510
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-03-09
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Environmental hydraulics Smoothed particle hydrodynamics Two-phase flows Diffusion Advective diffusion Oceanography Meteorology/Climatology Hydrogeology Mechanics Environmental Physics
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Water Science and Technology

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