So far, the necessary simplifications have been performed in a time consuming manual process. In addition it will create small grid cells that consequently lead to a high computation time. If there are too many small geometric details, mesh generation may fail. The geometric requirements needed for Computer Aided Engineering (CAE) and Computational Fluid Dynamics (CFD) increase the already very high complexity of processing 3D models. 3D models can be used for applications that range from simple graphic visualizations to complex simulations, such as air flow and acoustic simulations. ![]() ![]() ![]() As the number of virtual 3D city models is steadily increasing, so are the possible applications that take advantage of them.
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