Anisotropic Adaptive Simulations in Aerodynamics
Anisotropic Adaptive Simulations in Aerodynamics
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DOI：
10.2514/6.2010-169
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发表时间：
2010-01
期刊：
影响因子：
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通讯作者：
A. Loseille;R. Löhner
中科院分区：
文献类型：
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作者：
A. Loseille;R. Löhner
准确地、自动地捕捉复杂飞机周围的整个流动的复杂性，在空气动力学中仍然是一个未实现的目标。事实上，流动的各种特征通常会导致设计一种独特的全球方法的严重限制。通常，特定网格自适应是一种用于使网格局部适应流动的特定特征的可能方法。使用结构化网格的边界层网格生成是自适应的一个例子，该自适应被用作用于准确捕捉物体附近的速度分布的预处理。然后，设计了各向异性非结构网格自适应来自动覆盖流动的其他成分：激波、剪切层、尾迹。。。然而，成功进行精确的CFD计算所必需的这两个要求通常是独立考虑的。本文的范围是介绍一个通用的基于度量的框架，其中这两个需求与完全非结构化的视图一起完成。然后，我们利用局部重新网格化的方法来生成符合度规张量场的大小和方向的各向异性网格。
Capturing accurately and automatically the complexity of the whole flow around a com- plex aircraft is still an unachieved goal in aerodynamics. Indeed, the various features of the flow generally induce severe limitations to devise a unique global method. Generally, specific mesh adaptation is one possible method employed to fit locally the mesh to the particular features of the flow. Boundary layer mesh generation using structured grids is one example of adaptation utilized as a pre-processing to accurately capture the speed profile near a body. Then, anisotropic unstructured mesh adaptation is devised to cap- ture automatically other components of the flows: shocks, shear layers, wake. . . However, these two requirements necessary to succeed an accurate CFD computation are generally envisaged independently. The scope of this paper is to introduce a general metric-based framework where these two requirements are done conjointly with a fully unstructured view. We then utilize a local remeshing approach to generate an anisotropic mesh that complies with the sizes and orientations of the metric tensor fields.