Moreno et al.  (hereinafter referred to as MT) used a particle-tracking scheme to investigate the physics of solute movement in a variable-aperture planar fracture. The spatially heterogeneous fluid velocity was assumed to be the only mechanism of solute movement; local or pore scale dispersion and molecular diffusion were assumed to be negligible. The particle-tracking scheme used by MT consisted of routing particles from node to node in a finite difference grid. In this scheme, the direction of an individual particle is randomly selected and the probability associated with the particle movement in a given direction is proportional to the fluid flux in that direction. The same method was used by Desbarats  to investigate advective transport in aquifers composed of two porous media of different hydraulic conductivities.
Additional publication details
|Publication Subtype||Journal Article|
|Title||Comment on “Flow and tracer transport in a single fracture: A stochastic model and its relation to some field observations” by L. Moreno et al.|
|Series title||Water Resources Research|
|Publisher||American Geophysical Union|
|Contributing office(s)||Pennsylvania Water Science Center|