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Clean water

Specify domain’s starting fluid composition and temperature on the Initial pane. Clean water. Start and end times of two reaction intervals. Set initial fluid temperature. Inlet fluid enters the domain from t = 0 to 2 years. Inlet fluid carries Pb ++ pulse into the domain.

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Clean water

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  1. Specify domain’s starting fluid composition and temperature on the Initial pane Clean water Start and end times of two reaction intervals Set initial fluid temperature

  2. Inlet fluid enters the domain from t = 0 to 2 years Inlet fluid carries Pb++pulse into the domain Set temperature of first inlet fluid

  3. Inlet 2 fluid enters the domain from t = 2 to 10 years Clean rinse water: negligible Pb++in the second inlet fluid Set temperature of second inlet fluid

  4. Specify domain size, gridding, and flow rate on the Domain pane. Domain is 1 km long, divided into 400 nodal blocks Set flowrate for 1st and 2nd reaction intervals Set specific discharge or head drop

  5. Set various mass transport and thermal properties on the Medium pane. X1t and X2t account for mass transport by advection, hydrodynamic dispersion, and molecular diffusion… … and heat transfer by advection and conduction.

  6. Pb++pulse transported through the domain by advection, dispersion, and diffusion.

  7. Hot water is injected into the domain’s inlet. Heat transported by advection and conduction.

  8. In a dual porosity model, each nodal block is divided into a free-flowing zone and a stagnant zone. Config → Dual Porosity… On/off toggle 40% of the aquifer is stagnant. Characteristic dimension of the stagnant zone

  9. Pb++travels from one nodal block to another only through the free-flowing volume, but it can diffuse into and out of the stagnant zones.

  10. Fluid composition, temperature, medium properties, and more can be set to vary in space. Random field Porosity varies about a mean of 30% with a standard deviation of 5%. Click + to set heterogeneous values using random fields, tables, equations, scripts, or functions.

  11. Porosity has been set as a random variable.

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