| Abstrakt: |
A procedure of simulating, by means of a physical model, the dispersion of a solute in ground water flowing through a homogeneous and isotropic aquifer is considered. Ground water is a solution of variable density and viscosity owing to variations of solute concentration. The model has a very restricted application owing to the required simultaneous invariancy of four nondimensional criteria of similitude: a macroscopic Reynolds number, a macroscopic Peclet number, the criterion of geometrical similarity of the medium, and the criterion of physicochemical similarity of the solution. However, at certain conditions, which are common in practice, some of those criteria can be waived, and the model becomes a useful device for the solution of field problems. These conditions occur in the range of validity of Darcy's law (small Reynolds numbers), at relatively high Peclet numbers, and at very small variations of relative solute concentration (ideal solute). [ABSTRACT FROM AUTHOR] |
Plný text