Urban block three-dimensional model construction and mesh generation method and system suitable for CFD

Abstract

The invention relates to an urban block three-dimensional model construction and mesh generation method and system suitable for CFD (computational fluid dynamics). The method comprises the following steps: reading a building vector data file containing height attribute characteristics, and constructing a three-dimensional scene in a white film form; obtaining geometric features and height attributes of all buildings in the simulated boundary geometry by adopting a spatial inclusion relation; a CPU / GPU parallel Gaussian projection conversion algorithm is constructed, and rapid conversion from geographic coordinates of geometric features of buildings in the simulated boundary to space Cartesian coordinates is achieved; packaging an ICEM CFD geometric model by adopting a parameterization design method to construct a related command stream, and realizing automatic construction of a city block three-dimensional model; and packaging an ICEM CFD unstructured grid division related command stream by adopting a parameterization design method to realize the unstructured grid division of the three-dimensional model of the city block.

Description

technical field [0001] The invention belongs to the coupling field of interdisciplinary fluid dynamics and geographic information science, and relates to a method and system for constructing a three-dimensional model of a city block and dividing a grid, which are applicable to CFD, and specifically relate to constructing a three-dimensional geographic scene and building geometric features and height attributes Acquisition, CPU and GPU parallel Gaussian projection algorithm realizes fast projection conversion of geographic coordinates, quickly builds a 3D model suitable for CFD city block simulation and a parametric design method for unstructured grid division. Background technique [0002] CFD is the product of the combination of modern fluid mechanics, numerical mathematics and computer science. Using CFD to establish the calculation model of the research object, applying fluid dynamics to the model for calculation, can analyze and study the dynamic and thermodynamic behavio...

AI Technical Summary

Problems solved by technology

With the rapid development of CFD, CFD-based numerical simulation of urban blocks has become a research hotspot, but the construction and grid division of 3D models of urban blocks with complex building structures takes up a lot of time for researchers, resulting in simulation calculations that do not have real-time In addition, for some complex urban blocks that are difficult to complete the construction of 3D models, the simplified 3D models are mostly used, which also leads to the limitation of the simulation.

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