Note: The accuracy of the
decay algorithm in GoldSim is a function of the solution precision setting
(high, medium or low) defined in the Contaminant Transport tab of the
Options dialog (accessed from the main menu by selecting Model |
Options).
Mathematically, if A decays to B, GoldSim computes the rate of change of mass (at a particular location) as follows:
dMA/dt = - MA DA
dMB/dt = MA DA RBA WB / WA
where:
MA = the mass of
species A
(mass);
dMA/dt = the rate of change of species A
(mass/time);
dMB/dt = the rate of change of species B
(mass/time);
DA = decay rate of species A (1/time);
RBA
= stoichiometry (moles B produced per moles A decayed);
WA =
molecular (or atomic) weight of species A; and
WB = molecular (or
atomic) weight of species B.
Note: The accuracy of the
decay algorithm in GoldSim is a function of the solution precision setting
(high, medium or low) defined in the Contaminant Transport tab of the
Options dialog (accessed from the main menu by selecting Model |
Options).