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A Survey of Overset Domain Assembly Methods

机译：过度域组装方法概述

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Overset or Chimera grid methods are widely used in industry and academia to solve problems with bodies in relative motion or complex geometry that would otherwise be challenging or even impossible due to the impediments imposed by a single grid representation. These methods utilize a composite mesh to span the computational domain. The composite mesh consists of an arbitrary number of overlapping component meshes. Because the component meshes overlap, inter-grid boundaries must be defined and interpolation stencils must be provided to the flow solver by an overset domain assembly code. The process of defining inter-grid boundaries is often referred to as "hole cutting" because pieces of the component meshes are removed from the computational domain. Hole cutting is computationally expensive and has proven difficult to efficiently parallelize. In order to address this difficulty, the sources of computational cost and those that impede scalability must be identified. This work presents the major sources of computational cost and summarizes current techniques used in their mitigation.
机译：过冲或Chimera网格方法广泛用于工业和学术界，以解决相对运动或复杂几何体存在的问题，这些问题否则将因单一网格表示所施加的障碍而具有挑战性，甚至是不可能的。这些方法利用复合网格来跨越计算域。复合网格由任意数量的重叠组件网格组成。由于组件网格重叠，因此必须定义网格间边界，并且必须通过覆盖域组装代码将插值模板提供给流求解器。定义网格间边界的过程通常称为“孔切割”，因为已从计算域中删除了部分组成网格。孔切割在计算上是昂贵的，并且已经证明难以有效地并行化。为了解决这个困难，必须确定计算成本的来源和阻碍可伸缩性的来源。这项工作提出了计算成本的主要来源，并总结了目前用于缓解这些问题的技术。

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