Research And Application Of Integration System Of Flow-Sediment Mathematical Model And Visualization

Recently, software for mathematical models in hydraulic science is developed by many universities and iesearch institutes. There are some famous foreign softwares. Their flow modules are succeeded, while the sediment modules are not because of formula and parameters' applicability etc., so their sediment modules are not used commonly in our country. Domestic numerical model systems are applicable for river or estuarine and costal areas, but few for both. Another disadvantage about some domestic systems is more research about integration systems for flow module but less for sediment module. So it is necessary to do some research on integration system of flow-sediment numerical model and visualization that is applicable to fluvial, estuarine and costal areas.The integration system is based on VC++ language. The mathematical models are integrated by DLL(Dynamic Link Libraries) created by Fortran language. Based on previous research, the dynamic visualization for velocity field, flow streamline, sediment content, river bed (or sea bed) deformation etc. are developed by VC++. Considered that AutoCAD is used broadly, the integrated system make link with AutoCAD by DXF file. In order to make more efficient, the multithreading is used in the program. Then an integrated system is finished, which contains preprocessing module, calculate module, and post-processing module. The main function and features are:(1) The preprocessing module provided automatism creation and draw of orthogonal curvilinear coordinate grid. Another main function of preprocessing module is that terrain data on every gird node can be got from AutoCAD. The calculate module is adapt to river, estuarine and coastal areas. As for river, steady flow and sediment movement can be simulated. As for estuarine and coastal areas, tidal current and sediment transport that under action of tidal or both tidal and wave can be simulated. Real time visualization is applied, that is calculate progress, verification of hydrology elements (water/tidal level, velocity value, velocity angle, etc.), velocity field, sediment constration field and so on can be shown while calculating. The post-processing module applies the function of facture and show of dynamic visualization for velocity field, flow streamline, sediment...