feflow_user_manual_classic.pdf

The joining can either be performed interactively or

Info icon This preview shows pages 57–59. Sign up to view the full content.

The joining can either be performed interactively or automatically for all lines. The line order for joining can be selected based on the order in the line file or based on the order of an arbitrary database column. bñéçêí Exports the boundary conditions into files. léíáçåë Head boundary conditions: Head boundary conditions can be input using differ- ent units: • Hydraulic head [m] • Pressure [kPa] • Seepage face [m] • Saltwater head [m] • Saturation [1] • Moisture content[1] The values are converted into (freshwater) head [m] at input according to the properties of the model, e.g., the parametric relationship for unsaturated conditions or the maximum salt concentration in the model. Using the seepage face condition, a hydraulic head equal to the nodal elevation is set in combination with a con- straint condition allowing outflow only. Flux and Transfer boundary conditions: Are only important for flux and transfer boundary conditions in a certain context. Values of flux and transfer can be treated as area-independent, which means that the discharge varies with the cross-sectional area of the effective aquifer, or treated as depth-inte- grated where a varying cross-sectional area does not affect the quantity of the discharge. For unsaturated flow the flux boundary condition can differ between flux-type and gradient-type conditions. The latter is useful to formulate free drainage boundary conditions. Well boundary conditions: Wells can be either input node by node or as multi- layered wells using a special input dialog. `çåîÉêí Changes type and attributes of boundary conditions, for example, you can convert flux boundaries to trans- fer boundaries. Note that the values remain constant but the units change.
Image of page 57

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

RU ö rëÉêÛë j~åì~ä J m~êí f RK mêçÄäÉã bÇáíçê RKU cäçï j~íÉêá~äë The submenu items explained in this section are used to enter the material conditions for the flow equa- tions. The specific material requirements depend on the problem dimensionality and projection type for 2D problems (horizontal, vertical, axisymmetric) as selected in the Problem class menu. Note that these items imply different meanings for the Tools button, which can be set either to Assign , Join , Copy , Show , Vanish, Debug , T-List, Special or Options . The Assign tool is the default. It allows the assignment of material- parameter values necessary for describing the selected problem type. For more detailed information about these tools see Section 5.6. The required physi- cal units of each mate- rial parameter are indi- cated in the Keyboard request box. The input follows the same steps as outlined above for initial conditions. In addition to the standard Flow data tools described in Section 5.6, the following tools are available: ^ëëáÖå Time-dependent material data can be regionalized using the ’Database’ option either from power func- tions at specified locations or from a database contain- ing the values for each time step in a column. See online help for a detailed description.
Image of page 58
Image of page 59
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern