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Solution adaptive grid strategies based on point redistribution

机译：基于点重新分布的解决方案自适应网格策略

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Solution adaptive grid strategies based on the redistribution of a fixed number of points are described in this paper. The redis- tribution is performed using weight functions that vary based on significant flow features. The weight functions are evaluated using an equidistribution principle. In this paper, emphasis is placed on the developinent of weight functions applicable to compressible flows exhibiting large scale separated vortical flows, vortex vortex and vortex-surface interactions, separated shear layers and multiple shocks of different intensities. Algebraic, elliptic and parabolic methods of grid generation have been utilized for structured grid re- distribution. Additionally, a point movement scheme is presented for generalized (structured/unstructured/hybrid) grid adaptation. Computer Aided Geometry Design (CAGD) techniques are combined with redistribution schemes to maintain the fidelity of solid boundaries. In particular, solid boundaries are represented using Non-Uniform Rational B-Splines (NURBS). A grid generation software system - Parallel Multiblock Adaptive Grid generation (PMAG) - using an elliptic redistribution scheme is also described with emphasis placed on the parallel implementation for multiblock structured grids with unstructured blocking topologies and on interpolation issues. Computational examples demonstrating the influence of different weight functions and grid redistribution strategies are presented.
机译：本文介绍了基于固定点数重新分配的解决方案自适应网格策略。使用权重函数执行重新分配，权重函数根据重要的流量特征而变化。权重函数使用均分布原理进行评估。在本文中，重点放在适用于可压缩流的权重函数的发展，这些可压缩流表现出大规模的分离涡流，涡旋涡和涡旋-表面相互作用，分离的剪切层以及不同强度的多次激波。网格生成的代数，椭圆和抛物线方法已用于结构化网格重新分配。此外，提出了一种针对通用（结构化/非结构化/混合）网格自适应的点移动方案。计算机辅助几何设计（CAGD）技术与重新分配方案相结合，以保持实体边界的保真度。特别是，使用非均匀有理B样条（NURBS）表示实心边界。还介绍了使用椭圆再分配方案的网格生成软件系统-并行多块自适应网格生成（PMAG），重点放在具有非结构化块拓扑的多块结构化网格的并行实现以及内插问题上。计算示例说明了不同权重函数和网格重新分配策略的影响。

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