Research And Development Of Visual Software System In FEM Calculation For Underground Water

FEM(Finite Elementary Method) is one of the important numeric calculation methods used in Groundwater Gynamics. The application of FEM has advanced rapidly Groundwater Gynamics. Visualization in Scientific Computing is a important studying direction in the fields of calculation in Groundwater Gynamics. The calculation of FEM need the support of Visualization in Scientific Computing, which makes for the development of Groundwater Gynamics.The paper narrates first the theory of the main seepage in Groundwater Gynamics.Then, the Visualization in Scientific Computing in all phases of FEM(Preprocessing Phase, Computing Phase and Postprocessing Phase) of the main seepage problem in Groundwater Gynamics is analyzed and studied. The main contents of this part are as following:the development environment of Visualization in Scientific Computing,the main methods of net dividing in the preprocessing phase of FEM,the choice of net dividing methods,the visual technology of computing phase in FEM , the visual technology of postprocessing phase in FEM,the implemention technology of contour about water head in postprocessing phase,the water head changing curve of insteady artesian underground water flowing,the third dimension graphics and the volume rendering graphics in underground water,the identifier of net graphics,the development basis of OpenGL in Delphi in postprocessing phase.The analysis, design and implemention of Visual Software System in FEM for Underground Water are completed with the technology of OO(Object Oriented),the model method of UML(United Modle Language) and Delphi 7.0.The software system is made up of preprocessing modle, computing modle and postprocessing modle. The analysis, design and implemention of automatic net dividing and semi-automatic net dividing in the preprocessing...