Description |
3DADE is a research code for evaluating analytical solutions of the 3D solute transport equation under uniform flow conditions. The transport equation includes terms for advection, dispersion, first-order decay, zero-order production, retardation factor, representing equilibrium sorption. Solutions are given for both Cartesian and radial coordinate systems and assume one-dimensional steady-state flow. The solution scenarios include boundary value problems with a diffuse source in a semi-infinite region, a rectangular source at the surface, and a circular source at the surface, and initial value problems with a parallelepipedal and a cylindrical initial distribution. Each case is solved for both first- and third-type boundary conditions. The principle of superposition may be applied to the initial and boundary value problems because of linearity of the transport problem. The program also includes three simple steady-state solutions for continuous solute application at the surface with no production, decay, longitudinal dispersion and retardation. |