Pseudo-Spectral Methods for LES of Complex Flows

复杂流 LES 的伪谱方法

• 批准号: 5405907
• 负责人: Professor Dr. Michael Schäfer
• 金额: --
• 依托单位: Fachgebiet Numerische Berechnungsverfahren im Maschinenbau
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2003
• 资助国家: 德国
• 起止时间: 2002-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5405907?language=en
• 关键词: Pseudo; Spectral; Methods; LES; Complex

The purpose of the present project is the development, analysis, and application of a flexible pseudo-spectral method allowing LES with high accuracy and efficiency for complex practical turbulent flow problems. The project work will include the joint implementation of a corresponding pseudo-spectral code involving adequate dynamic subgrid models and advanced numerical techniques for the discretization and solution of the governing model equations. Special emphasis will be given to validation and verification aspects as well as a quality assurance with respect to numerical accuracy and efficiency. This will include investigations of basic question regarding the interaction of LES subgrid scale models with spectral discretizations. For comparisons results from other projects within the Research Group as well as results of direct numerical simulations for basic cases of complex flows inside generic geometries will be considered.

本项目的目的是开发、分析和应用一种灵活的伪谱方法，使大涡模拟具有高精度和高效率地处理复杂的实际湍流问题。该项目的工作将包括联合实施相应的伪谱代码，包括适当的动态子网格模型和用于离散化和求解主导模型方程的先进数值技术。将特别重视验证和核查方面，以及在数字准确性和效率方面的质量保证。这将包括关于LES次网格尺度模式与谱离散化相互作用的基本问题的研究。为了进行比较，将考虑研究组内其他项目的结果以及对一般几何内部复杂流动的基本情况进行直接数值模拟的结果。