Rkpko iáëí íáãéjêéäíéç ãíéêáä çí

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RKPKO iáëí íáãÉJêÉä~íÉÇ ã~íÉêá~ä Ç~í~ In FEFLOW all material data can vary over space and time. The data are assigned via the T-List tool or the Join tool in the Material data menus of the Flow data and Transport data options (Section 5.5 and Sec- tion 5.9). The submenu termed Material data time list menu displays, for each material parameter, the time values for which material distributions are defined. During the simulation, the current value is obtained by interpolat- ing between these given time steps, either linearly (‘Polylined’) or using a third-order polygonal smooth- ing (‘Akima’). Time-related material data can be applied in linear (non-cyclic) or cyclic mode (see Section 5.3.1). Time-related material data is stored either in the problem file ( *.fem ) or in an external ASCII or binary file ( *.mli ). Specify the name of the external file in the input field. The Preview time dependency button opens a plot window for the time-varying data for each element in a diagram. Figure 5.5 Material data time list controller. Figure 5.6 Preview time dependency of material data.
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RM ö rëÉêÛë j~åì~ä J m~êí f RK mêçÄäÉã bÇáíçê To delete the entire material list push the Delete list for material button. RKQ Pa päáÅÉ bäÉî~íáçå This submenu allows you to define, control, and plot the elevations of the single slices in a 3D problem. Use the z -coordinates button to assign the eleva- tions to the nodes. Besides the ’Global’ and ’Nodal’ mode a linear interpolation method (’Skew plane’) and different regionalization methods for imported data (’Database’) are available. Click Reconfigure 3D task to enter the Layer con- figurator window. The Layer configurator allows you to visualize and modify the different layers and slices and their elevations in a 3D model (see Section 10.4.2). To avoid intersection of slices during the assigning of z-elevations a minimal slice distance can be defined in the Slice distance modifier . For more detailed explanations see FEFLOW online Help . RKR cäçï a~í~ Initial conditions, boundary conditions, and flow material parameters can be displayed and edited. Pushing the Flow data button in the Problem Editor menu invokes the Flow data submenu. The first item, Flow initials , opens a submenu for assigning and viewing the initial hydraulic head condi- tions. More information about this item is available in Section 5.6. The Flow bound- aries option enables you to edit first-, sec- ond-, third-, and fourth-type boundary conditions and con- straints in a separate submenu. Parameter values can be entered either graphically using the ’Nodal’, ’Border’ and ’Rubber- box’ options or by different 1D and 2D ’Database’ interpolation methods. Both stationary and time-vary- ing boundary conditions can be assigned. The defini- tion of constraints for the boundary conditions is executed via submenus.
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