Description
FEFLOW is capable of representing building basements, garages and wall barriers with the deactivation and activation of specific elements.
Inactive elements are removed from the simulation for a certain period, defined by the user, creating an effect analogous to a fully impermeable barrier. Their activation can be controlled by timeseries as well.
NOTE: The definition of In-/active Elements can be applied to phreatic, fully confined or Richards' Equation models, not to Free Surface!
You have the following 2 options:
#01 - For Steady-State models
Go to In-/activate Elements and select the specific selection and assign it as inactive - see Fig. 1.
Fig. 1 - Data Panel-> In/activate Elements option and the selected specific elements highlighted
#02 - For Transient models
If your barrier is dynamically de-/activated , go to In-/activate Elements and with a right-click "Make Transient", then add the time stage changes, when the parameter needs to be active or inactive - see Fig. 2.
Fig 2 - Make transient the in/activate Elements
In the dialog below, you can add the list of Time Stages (Fig 3.).
Fig. 3 - Add time stages
Once you click on "OK", you can move to the correct time (using forward/backward toolbar in the Slice View) and assign the parameter value - see Fig. 4.
Fig 4 - Assign the parameters to the correct time stages
You can then manually define the inactive elements if the Time Stages list is not too long - see Fig. 5.
Fig. 5 - Time-dependent In-/active Elements
Alternatively, you can also prescribe the In-/active Elements time dependency via a Time-series (0: inactive and 1: active) - see Figs. 6 - 7.
Fig. 6 - Time-series defining the in-/activation of Elements
The Time-series can be assigned though the Editor as for any other time-varying Material Properties or Boundary Condition - see Fig. 7.
Fig. 7 - Choosing the time series for the specific element selection
FURTHER INFORMATION & USEFUL LINKS
Manuals and Guidelines
FEFLOW 8.1 Documentation - FEFLOW Time Series
FEFLOW 8.1 Documentation - Time Series Editor