DHIJWASv Software FEFLOW 6.1

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OK=tÜ~íÛë=kÉï=áå=cbcilt=SKN\ NM=ö=rëÉê=j~åì~ä (e.g., to calculate groundwater drawdown). The easy-to-use Expression Editor handles arbitrary mathematical expressions not unlike the already familiar definition of chemical reactions or expressionbased groundwater recharge. Users of the Classic user interface may already be familiar with this tool from the definition of chemical reactions or expressionbased groundwater recharge. Page 74 OKP qáãÉJs~êóáåÖ= j~íÉêá~ä mêçéÉêíáÉë For the definition of time-varying material properties, FEFLOW 6.1 provides multiple settings and convenient import and assignment options: Time-varying values can be assigned manually if a parameter has been made transient before. Manual assignment from time series is also available following the same workflow as for the assignment of transient boundary conditions. Automatic map-based assignment via the Parameter Association dialog supports multiple data formats: Map data can be assigned to the currently selected time, different attribute fields can be assigned to different time stages, time/value pairs can be linked to a parameter and time-series files can also be joined to imported maps. Additionally, assignment via the new Expression Editor is also supported. Page 76 OKQ aáëÅêÉíÉ=cÉ~íìêÉë As in earlier versions, Discrete Features (DF) can be added to models to represent highly conductive oneor two-dimensional features, such as tunnels, pipes, drains, faults or fractures. Starting with FEFLOW 6.1, Discrete Features (DF) are grouped in the Data panel to allow easy access to visualization and editing functionality. The features can be named to facilitate their identification during the modeling process. Significantly, it is now possible to create arbitrarytype 1-dimensional Discrete Features connecting nodes on different slices, e.g., to represent inclined boreholes. Page 71 OKR j~íÉêá~ä= mêçéÉêíáÉë= Ñçê råë~íìê~íÉÇ=cäçï FEFLOW 6.1 provides comfortable editing options for the definition and assignment of the material properties required for unsaturated/variably saturated flow modeling via Richards’ equation. The relationships between capillary pressure and saturation and between saturation and hydraulic conductivity can be defined via Spline Models or via one of the available Empirical Models. Page 41 OKS pÉäÉÅíáîÉ= jÉëÜ= pãççíÜJ áåÖ In many cases, refining the finite-element mesh locally becomes necessary during the modeling process. Local mesh refinement can lead to a loss in mesh quality as ill-shaped elements result at transitions between refined and nonrefined areas. With the new selective mesh smoothing tool, the mesh quality can be restored where needed, while maintaining the original position of boundary conditions and other features that should not move.
Selective smoothing is also useful to improve the general mesh quality directly after the mesh generation process, maintaining the location of nodes placed on supermesh polygon boundaries, lines, and points. Page 37 OKT j~éJa~í~=e~åÇäáåÖ Major improvements have been implemented to make the usage of database information more flexible. An immediate preview of attribute tables is now available as well as the possibility to filter/select map data by user-defined SQL selection queries. It is also possible to join additional related information from other database files to existing maps. While in FEFLOW 6.0 map-based node or element selections were limited to 2D maps, version 6.1 also allows to create selections based on 3D map geometry. Page 22 OKU =jìäíáä~óÉê=tÉääë Multilayer wells have been improved both in terms of numerical computation and data handling. Screened well sections are now modeled as discrete features which significantly improves the control of the borehole-internal mass- and heat-transport calculations. Introducing the borehole radius as a new model parameter, it is now possible to account for the actual flow resistance of narrow boreholes. To facilitate the data handling, FEFLOW allows the Multilayer well import from map files, directly using the elevations of the top and bottom end of the well screen to identify the correct model slices for the boundary-condition assignment. Manual assignment is possible using a convenient dialog to enter all required data (including time series as pumping rate). Finally, new visualization styles are used to compare actual and virtual well radius to determine the optimal distance to neighboring nodes for an accurate drawdown calculation. Page 68 OKV _çêÉÜçäÉ=eÉ~í=bñÅÜ~åÖJ Éêë Incorporating the experience gained over the past years in using Borehole Heat Exchangers (BHE) in FEFLOW Classic, new tools have been added and shortcomings of the existing approach have been eliminated in FEFLOW 6.1. The new, separate BHE boundary condition allows a direct prescription of the inlet temperature (as constant or transient value) as well as defining differentials of power or temperature to represent the operation of heat pumps - without the need for additional plug-ins. Furthermore, arbitrary connections between the feed and return pipes of different Borehole Heat Exchangers can be created to model parallel or serial connections in heat-exchanger arrays. As for Multilayer wells, additional visualization styles are available to show the actual and virtual well radius. A third style acts as an indicator for the optimal nodal distance while designing the mesh for an accurate calculation of the absolute temperature at the borehole heat exchanger. Page 69 OKT=j~éJa~í~=e~åÇäáåÖ cbcilt=SKN=ö=NN
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interval for isolines, deactivate t
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Figure 10.2 Algebraic signs for bou
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distributions. In this case, the va
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Figure 10.6 Map data input for noda
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Figure 10.8 Expression Editor. Arbi
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e edited manually or imported from
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able as attribute fields that can b
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of the 0 mg/l fixed-concentration B
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are edited in the table below. Leav
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Figure 10.20 Parameter Association
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dataset, click on Edit borehole hea
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páãìä~íáçå Running a FEFLOW
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control and model parameters is pre
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Figure 11.5 Observation Point Prope
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NOKU bñéçêí Figure 12.2 Pathli
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Figure 12.5 Scaled budget spheres a
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To visualize the transient flow fie
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^åáã~íáçå=~åÇ=sáÇÉç=b
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view in which we show how the mesh
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Open the Plug-ins panel via View >
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* * TODO: Add your own code here...
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DHIJWASv Software FEFLOW 6.1

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