Understanding Precipitate Removal Mass Flux Links

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Xuezhong Yu

• January 18, 2026 17:03

The GoldSim webinar in Aug 2025 provided Example3 which used the Precipitate Removal Mass Flux Links: https://support.goldsim.com/hc/en-us/articles/360033668533-Simulating-Treatment-Processes-using-the-Contaminant-Transport-Module-August-2025.

I have a question for the Precipitate Removal Mass Flux Links:

1) I ran a test removing the element Sink_Removed_Mass in the Example3 model, indicating the Precipitate Removal Mass Flux Link was removed. The concentrations in the Treatment_Tank remained unchanged. Moreover, Sink_Removed doesn't affect any element. 

2) In Example3, the acumulation of  (Fe_in - Fe_out) equals to the values of Sink_Removed_Mass.

Therefore, my understanding is: the mass of Precipitate Removal Mass Flux Link is the precipated mass due to the solubility limit and Precipitate Removal Mass Flux Link just removes precipitated mass. Is this correct?

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  Rick Kossik

  • January 19, 2026 15:43

  Yes, that is correct.  The Precipitate Removal Mass Flux Link removes that mass that has been precipitated.  Just set the rate to a high number so precipitate is immediately flushed out.

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  Xuezhong Yu

  • January 19, 2026 18:17

  Thanks Rick for the response. A further question: what happens if Precipitate Removal Mass Flux Link is not included in the model? In Example 3, it appears that removing the Precipitate Removal Mass Flux Link did not change the model's results.

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  Rick Kossik

  • January 19, 2026 19:54

  If you remove that link, none of the mass will be removed.  It will be precipitated out solution and will still be present (as a precipitate) in that cell.

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