FEFLOW - FEFLOW is a finite element subsurface flow system - density-dependent groundwater flow, contaminant transport and thermal or heat transport model FEFLOW Categories: flow models - saturated zone, flow models - unsaturated zone, solute transport - saturated zone, solute transport - unsaturated zone, heat transport, natural attenuation, saltwater intrusion

What's New In FEFLOW

True Color Support
The switching of the screen settings to 256 colors is no longer necessary. A new Map ID Editor provides functionality for editing the display options of background maps
(colors, line properties, transparency, ...) in true color mode.



 
Fracture Modeling
1D and 2D channel or fracture elements can be added to the model for the simulation of flow, mass and heat transport problems. An interactive fracture editor is available for that purpose. The computation of the channels and fractures is alternatively done by the Manning-Strickler, Hagen-Poiseuille or Darcy laws.



 
64-Bit Data Handling
All internal end external data is handled and stored in 64 bit format. Please note that FEFLOW requires a higher amount of memory (up to 30 %) due to the increased precision. Previous FEFLOW releases are not able to read the new file format. Use the 'Version' setting in the file selection box to save *.smh, *.fem and *.dac files for the use in lower FEFLOW versions, putting up with the loss of precision. Of course, FEFLOW 5.0 can read the previous file formats. The file addressing has also been extended to 64 bit, so that FEFLOW is now able to save and read files containing more than 2 GB of data, if such files are supported by the operating system.




New Diagrams
Curves out of measurement data or analytic functions can be added to all diagrams. Lots of the properties of diagrams are editable (styles and colors, visibility, axes...). 




Content Analyzer
The water, mass or energy content of the model can be computed as well from the simulator/postprocessor as from the problem editor.




Capillary Hysteresis
For the modeling of unsaturated/variably saturated properties the capillary hysteresis can be taken into account. 




New Parametric Model
A new parametric model called 'van Genuchten modified' is available for the simulation of unsaturated/variably saturated properties.




Automatic Parameter Estimation
The capillary head vs. saturation curves for unsaturated flow as well as sorption curves for mass transport can be computed based on measurement data using the additional tool FE-LM2. 




Increased Precision of Computation
For the simulation of unsaturated/variably saturated properties the residual control has been implemented also for the Picard method. 




Assigning Time Dependent Material Data by Regionalization
Time dependent material data can be assigned from a database using different regionalization methods.




New Input Possibilities for Boundary Conditions
Boundary conditions can be assigned based on background data (join function) either interactive, automatically in the order of the lines in the file or in the order of a database column. Using the database option, boundary conditions can either be regionalized interactively or they can be applied automatically to the nearest node of the finite element mesh. 




Conversion of Boundary Conditions
Using the 'Convert' tool boundary conditions of several power function IDs can be converted at once. A list is provided to pick the power function IDs to convert.
Triangularization of Quadrangular Meshes
For the trinangularization into two triangular elements per quadrangular element the splitting direction can be chosen.




Multiple Selection of Power Functions
Multiple selection in the power functions editor is enabled to assign curve types (polylined, constant, Akima, Akima2) and time modes (non-cyclic, cyclic) for a number of selected functions.




Adaptation for Fixed Time Steps
Fixed (constant or varying) time steps are adapted to output time stages. Please note that the number of time steps can be increased and varying tme step increments can result. 




Curved Edge Joining
Joining operation is also performed for curved (parabolic or circular) edges of superelement meshes. 




Create Supermesh from ...
A new superelement mesh can be created from the outline of the current finite element mesh. 




Specific Option for Phreatic Top Slice
A phreatic top slice can either be computed confined if the water level rises the top or it can be automatically extended vertically to the water level mainaining a free surface like in previous FEFLOW releases. For the setting of the option a new dialog is provided. 




*.tfw and GeoTIFF Support
Additionally to the FEFLOW *.map file format the ESRI world file format *.tfw and the GeoTIFF file format are supported for the import of georeferenced TIFF images (*.tif) as background maps.




Reading of Incomplete/Corrupt Files
Opening incomplete or currupt *.smh, *.fem and *.dac files FEFLOW is able to recognize and read the correct parts of the files. The lost parts are indicated by a message.



 
New Hotkeys in Editors
Instead of hitting <ESC> to change to the keyboard request box in previous releases use <TAB> or a mouseclick into the box. <ESC> cancels the current function.



 
Visualization and Export of 2D Sections
Material parameters like conductivity can be visualized in 2D vertical sections in fringe mode without interpolation of the values. The fringes can be exported, e.g. to *.shp file format.




Import/Export of Data using Local/Polar Coordinates
For regionalizion the data is always imported using the currently set coordinate system. Thus also data in polar coordinates or local coordinates can be regionalized. Please note that for the import of data in global coordinates the coordinate system in FEFLOW (see info boxes at the left side of the working window) has to be set to global. In previous releases imported data was always expected to use global coordinates. Exporting points ('Save ASCII points' or 'Export ... data') also the currently active coordinate system is used.




Timeout Setting
In the License setup window the timeout for the license connection can be changed. This is important for obtaining a license via a slow WAN connection, where the default timeout of 20 seconds is not sufficient.




New API functions
Last, but not least additional API functions for the Interface Manager IFM are available, e.g. for budgeting fluid, contaminant and heat fluxes at single nodes and for the inverse incidence matrix.

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