Download PART Y: IGW Modeling Tutorial

Solutions for concentration plumes are very dependent on the grid size and the time step. They may
become oscillatory at a grid resolution that is too coarse, or with a time step that is too large. Now that we
have a refined grid size, we can model the plume right away. You should increase the resolution of the grid
and/or decrease the time step if your solution does in fact become unstable.
Step 7:
In the time TPS area, make the time step equal to [20 days].
You may initialize the particle clock and reset the particles before proceeding
to the next step
Step 8:
Click the „Map into a Numerical Model‟ button to discretize the model
Notice a plume appears inside the newly defined zone.
Step 9:
Click the „Forward‟ button to solve the model.
Notice how the plume spreads from the source
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