High-concentration dispersion in porous media
Researchers: prof.dr.ir S. M. Hassanizadeh, dr. R.J. Schotting and
prof. dr. ir. A. Leijnse
Salt domes are considered to be potential locations for disposal of high-level
radioactive and chemical
waste materials. Groundwater in the vicinity of salt domes containes large amounts
of dissolved salt, up to its saturation limit.
There is convincing experimental evidence that the dispersive behaviour of salt in
a porous medium is influenced due to the
presence of high salt concentration gradients. It is found that under
high-concentration gradient conditions, linear Fick's law for
the dispersive mass flux is no longer valid and has to be replaced by
a nonlinear expression. The validity of this nonlinear
alternative is studied using mathematical and experimental techniques.
Schotting, R.J., H. Moser, and S.M. Hassanizadeh, "High-concentration-gradient dispersion
in porous media: experiments, analysis, and approximations", Adv. Water Resour., 22, 665-680, 1999.
Hassanizadeh, S.M. and Leijnse, A., "A non-linear theory of high-concentration-gradient
dispersion in porous media," Adv. Water Resour., 18, 203-215, 1995.