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非结构多重网格法流场数值模拟

Numerical Simulation of Flow Field Using Unstructured Multigrid Algorithm

【作者】 吕宏强;

【导师】 伍贻兆;

【作者基本信息】 南京航空航天大学 , 流体力学, 2002, 硕士

【摘要】 在流体力学数值模拟的领域中,多重网格法被公认为一种有效的加速收敛措施。本文对非结构多重网格法进行了研究,其中包括重叠式非结构多重网格法和聚合式非结构多重网格法,并且分别给出了相应的算例。特别对于聚合式非结构多重网格法,本文设计了一种新的非结构网格的聚合方法,使得聚合成的粗网格具有很好的质量。在多重网格法求解Euler方程的时候,在每一重网格上迭代的时候我们采用有限体积方法。 此外,针对本文多重网格法方面的研究,在本文最后介绍了相关的软件开发及数据可视化方面的工作。

【Abstract】 In the field of numerical simulation of fluid flow, multigrid algorithm is an effective way to accelerate the convergence. In this paper, applications of the principles of the multigrid approach to unstructured mesh problems are described. Both the overlapping multigrid algorithm and the agglomeration multigrid algorithm have been illustrated and examples of practical applications have been given. Especially for the agglomeration multigrid algorithm, a new robust method to generate coarse grids has been developed, by which we can generate coarse meshes with good quality. When the multigrid algorithm is applied, the finite volume method is adopted on each layer to solve the Euler equations.Besides, in subsequent sections, some research about the related software engineering and visualization of data is dealt with.

  • 【分类号】O351
  • 【被引频次】3
  • 【下载频次】488
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