Specify domain’s starting fluid composition on the Initial pane

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Presentation transcript:

Specify domain’s starting fluid composition on the Initial pane Initial fluid in equilibrium with Quartz Aquifer is 70% Quartz

add → Kinetic → Mineral… You enable kinetic reactions on the Reactants pane. Mass already specified on Initial pane Specific surface area Rate constant You can also… Add promoting or inhibiting species add → Kinetic → Mineral… Use Arrhenius equation for polythermal runs Supply a nucleus density, critical S.I., cross-affinity terms, etc.

A single inlet fluid flows into the domain for 30 years. Define the reaction intervals. Specify what fluids flow into the domain, and when. A single inlet fluid flows into the domain for 30 years.

The inlet fluid is defined on the Fluids pane SiO2(aq) concentration sets the inlet fluid to be undersaturated with respect to Quartz

Specify domain size and gridding on the Domain pane. Domain is 100 m long, divided into 400 nodal blocks

Specify flowrate on the Flow pane. Pore fluid in aquifer displaced 100 times over the 30 year timespan we defined on the Intervals pane

Set various mass transport properties on the Medium pane. No value set, so porosity calculated from volume of equilibrium minerals: 70% Quartz → 30% pore space. Run → Go traces the model

SiO2(aq) concentration approaches Quartz equilibrium value. Inlet fluid is undersaturated with respect to Quartz.