Transport Options

Differencing scheme for transport equation may be:

• Centered in space: The preferred general method.
• Backward (upstream) in space: Less accurate than centered in space, but can be used to avoid oscillations when coarse spacing is used.
• Centered in time: (Crank-Nicholson scheme) Generally gives a more accurate simulation but could cause oscillations.
• Backward in time: (Fully implicit scheme) Generally gives a less accurate simulation but may be needed to avoid oscillations.

Adsorption/Ion Exchange

Note: Users may select one and only one option for adsorption or ion exchange. This option will be applied to all textural classes.

• None: Neither adsorption nor ion exchange occurs in the simulation.
• Linear isotherm
• Freundlich isotherm
• Langmuir isotherm
• Ion exchange: can be one of four types: monovalent-monovalent, monovalent-divalent, divalent-monovalent, divalent-divalent.

See also:

• Other model Options: Basic, Flow, Solver, Output, Fluid Balance, Solute Balance
• Select model options

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