Ultra-Sharp Nonoscillatory Simulation of High-Speed Steady Flows

高速稳态流的超清晰非振荡模拟

• 批准号: 8904595
• 负责人: Brian Leonard
• 金额: $ 7万
• 依托单位: University of Akron
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-08-15 至 1992-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8904595&HistoricalAwards=false
• 关键词: Ultra; Sharp; Nonoscillatory; Simulation; Speed

Development of reliable and accurate advection methods continues to be a major item in the construction of general-purpose computational fluid dynamics codes for use in fluid dynamics, heat transfer, combustion, and process engineering. A cost-effective implementation strategy for computation will be developed based on "adaptive stencil expansion": the base scheme uses limited third-order unwinding (ULTRA- QUICK); then in the strong curvature regions, the algorithm automatically expands the stencil to higher-order unwinding to improve accuracy and increase resolution. The expanded-stencil computation occurs only in narrow isolated regions of the computational field, thus adding little to the overall computational cost. Using a "downwind weighing factor", the arbitrary higher-order mulit- dimensional algorithm can be made compatible with existing commercial and research codes. The resulting algorithm will be tested and optimized on a number bench-mark problems involving passive convection-diffusion, laminar and turbulent flows and convective heat transfer.

发展可靠和准确的平流方法将继续是 通用计算系统建设中的一个重要项目， 流体动力学代码，用于流体动力学，传热， 燃烧和工艺工程。 具有成本效益的实施 计算策略将基于“自适应模板”开发 扩展”：基本方案使用有限的三阶解旋（ULTRA- 然后在强曲率区域，算法 自动扩展模板到更高阶的展开，以提高 提高精度和分辨率。 扩展模板计算 仅发生在计算领域的狭窄孤立区域中， 因此几乎不增加总的计算成本。 使用 “顺风加权因子”，任意高阶多， 维算法可以与现有的商业算法兼容， 和研究代码。 由此产生的算法将进行测试和优化的数字 涉及被动对流扩散、层流的基准问题 以及湍流和对流热传递。