Pseudo-Spectral Methods for LES of Complex Flows

本项目的目的是开发、分析和应用一种灵活的伪谱方法，使LES能够高精度和高效率地解决复杂的实际湍流问题。该项目的工作将包括联合执行一个相应的伪谱代码，其中包括适当的动态次网格模型和先进的数值技术，用于离散化和求解控制模型方程。将特别强调确认和核查方面以及数字准确性和效率方面的质量保证。这将包括调查的基本问题的相互作用LES亚网格尺度模式与光谱离散。为了进行比较，将考虑研究组内其他项目的结果以及通用几何形状内复杂流动基本情况的直接数值模拟结果。

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.