Implicit Massively Parallel Navier-Stokes Solver for Hybrid Structured/Unstructured Grids

用于混合结构化/非结构化网格的隐式大规模并行纳维-斯托克斯求解器

• 批准号: 9461885
• 负责人: Scott Imlay
• 金额: $ 7.5万
• 依托单位: Amtec Engineering Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-01-01 至 1996-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9461885&HistoricalAwards=false
• 关键词: Implicit; Massively; Parallel; Navier; Stokes

The recent emergence of high performance massively parallel processing (MPP) computers has theoretically reduced the computer time required for the design and analysis of systems involving fluid flow using Computational Fluid Dynamics (CFD). However, in practice, algorithms used in MPP today were developed for sequential computers and therefore do not harness the full power of massively parallel processing. Also, MPP computers have not simplified the structured grid generation process, which may take weeks for complex configurations. Amtec proposes to develop a new algorithm for computational fluid dynamics to harness the power of MPP. The research will focus on techniques for solving the Navier-Stokes equations on MPP computers using hybrid structured/unstructured finite-volume meshes. The structured grids will be used to resolve boundary layers near walls and unstructured grids will be used to discretize the remainder of the flow field. During phase I, a recently developed implicit procedure for 2D hybrid grids will be improved and parallelized using a novel domain decomposition technique. The new solution procedure will simplify the grid generation process by using hybrid grids, and reduce the computer time required by efficiently using MPP computers.

最近出现的高性能大规模并行处理(MPP)计算机在理论上减少了使用计算流体动力学(CFD)设计和分析涉及流体流动的系统所需的计算机时间。然而，在实践中，今天在MPP中使用的算法是为顺序计算机开发的，因此没有利用大规模并行处理的全部能力。此外，MPP计算机没有简化结构化网格生成过程，复杂的配置可能需要数周时间。AMTEC建议开发一种新的计算流体力学算法，以利用MPP的能力。这项研究将集中于在MPP计算机上使用结构/非结构有限体积混合网格求解Navier-Stokes方程的技术。采用结构化网格对壁面附近的边界层进行求解，采用非结构化网格对流场的其余部分进行离散。在第一阶段，最近开发的二维混合网格的隐式程序将被改进，并使用新的区域分解技术进行并行化。新的求解程序将通过使用混合网格简化网格生成过程，并减少高效使用MPP计算机所需的计算机时间。