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DOI: https://doi.org/10.4491/eer.2016.147
Spatial moment analysis of multispecies contaminant transport in porous media
N. Natarajan1, and G. Suresh Kumar2
1Department of Civil Engineering, Dr. Mahalingam College of Engineering and Technology, Pollachi 642003, TamilNadu, India
2Petroleum Engineering Programme, Department of Ocean Engineering, Indian Institute of Technology – Madras, Chennai 600036, Tamil Nadu, India
Corresponding Author: N. Natarajan ,Tel: +91-4259-236030 , Fax: +91-4259-236070, Email: itsrajan2002@yahoo.co.in
Received: December 1, 2016;  Accepted: September 28, 2017.
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ABSTRACT
Spatial moment analysis has been performed on the concentration of the first species in a multispecies solute transport in porous media. Finite difference numerical technique was used in obtaining the solute concentration. A constant continuous source of contaminant was injected at the inlet of the domain. Results suggest that the decaying of solute mass increases as the magnitude of mean fluid velocity increases. The dispersion coefficient is highly time dependent under decaying of solutes with a complex behavior of mixing of solutes. The solute mobility and mixing varies non-linearly with time during its initial period, while the same ceases with higher decay rates of the first species much faster.
Keywords: Dispersion | Mobility | Multispecies transport | Porous media | Spatial moments
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