Precipitate Removal Flux Links to/from Cells

Precipitate removal mass flux links are used to transport precipitated mass directly from one pathway to another. Mass can precipitate in a Cell if solubility limits have been defined for the species The chemical (or non-chemical, such as bacterial or viral) constituents that are stored and transported through an environmental system in a contaminant transport model. In GoldSim, the Species element defines all of the contaminant species being simulated (and their properties). in the fluid within the Cell.

They are defined by specifying a fractional rate at which the precipitated mass is being moved from one pathway to another. Hence, a precipitate removal mass flux is computed as the precipitated mass of the species in the pathway multiplied by a fractional transfer rate:

Precipitate Removal Mass Flux = Precipitated Cell Mass * Transfer Rate

The Transfer Rate has dimensions An output attribute for an element that defines the dimensionality (in terms of Length, Time and other fundamental dimensions) of the output. of inverse time. The Transfer Rate is specified as a scalar An output consisting of a single value or condition.. That is, all precipitate species are transferred at the same rate.

In most applications, the Transfer Rate will simply be input either as a large number (such that any precipitated mass is immediately removed) or a function that alternates between 0 and a large number (such that any precipitated mass is periodically removed, and allowed to accumulate between removals).

Precipitate removal mass flux links are uni-directional (mass can only be transported in one direction). That is, the Transfer Rate must be non-negative.

Note that in most cases, in order to use a Precipitate removal mass flux link An interconnnection between two transport pathways that defines the rate at which species move between the pathways. you will need to specify a local solubility (a solubility that varies depending where you are in the model).