feflow_user_manual_classic.pdf

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PO ö rëÉêÛë j~åì~ä J m~êí f PK jÉëÜ bÇáíçê d~ìëëJhêìÉÖÉê ÅççêÇáå~íÉë áåéìí Allows to enter absolute Gauss-Krueger coordinate values, xoGK and yoGK (in meters), for the origin of the local coordinates. The default values are (0., 0.). You can georeference the working window automati- cally by importing a background map for the model area (See Section 2.2). PKV oÉëí~êí jÉëÜ bÇáíçê This function should be used only if you wish to discard what you have created with the Mesh editor . Before restarting the mesh design, an alert box prompts for a selection from the following options: Save the current superelement mesh in a file. Restart the editor from the beginning. Cancel (no restart). PKNM pí~êí jÉëÜ dÉåÉê~íçê Clicking this button opens the Mesh generator . The Mesh Generator, which meshes the superelements with finite elements (quadrilaterals or triangles), is dis- cussed in Section 4.
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cbcilt SKM `ä~ëëáÅ ö PP Q jÉëÜ dÉåÉê~íçê QKN fåíêçÇìÅíáçå This section de- scribes the genera- tion of finite- element meshes. It is assumed that you have already cre- ated one or more su- perelements. During the simulation, re- sults are computed on each node of the finite-element mesh and interpolated within the finite ele- ments. The denser the mesh the better the numerical accu- racy, and the higher the computational effort. Numeri- cal difficulties can arise during the simulation if the mesh contains too many highly distorted elements. Thus some attention should be given to the proper de- sign of the finite-element mesh. To assist in creating a well-shaped mesh, FEFLOW offers various tools, in- cluding local refinement and derefinement of the mesh. QKO dÉåÉê~íÉ ^ìíçã~íáÅ~ääó A pop-up window allows you to enter the desired total number of finite elements (default is 1000) for the complete region of superelements. QKP dÉåÉê~íÉ ^êÉ~ääó Clicking on the Generate Areally button opens a new pop-up window. If the Advancing-front mesh gen- erator is selected (Section 4.5), you are asked to enter the desired number of elements for each of the super- elements. If you are using TMesh, Triangle or Trans- port mapping the Mesh density display/editor is opened which allows you to set the number of elements for each superelement. The left part of the window shows the number of elements which will be created for each superelement. The generation is invoked by clicking the Start button. (Re-)Compute element number distribution dis- Q jÉëÜ dÉåÉê~íçê The tool for automatized finite element generation.
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PQ ö rëÉêÛë j~åì~ä J m~êí f QK jÉëÜ dÉåÉê~íçê tributes a given total number of elements (default 1000) on the superelements. To change the number of elements for a particular superelement click on the cor- responding superelement number and type the new value in the Edit number of elements line. If Auto- zooming
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