Wall-layer models for large eddy simulation of complex flows

用于复杂流动大涡模拟的壁层模型

• 批准号: 5405894
• 负责人: Professor Dr.-Ing. Michael Manhart
• 金额: --
• 依托单位: Laboratoire des Ecoulements Géophysiques et Industriels (LEGI)
• 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 2009-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5405894?language=en
• 关键词: Wall; layer; models; large; eddy

Large Eddy Simulation (LES) is the most promising approach for the prediction of complex turbulent flows. By resolving fluctuating quantities, LES has the potential to become a widely used simulation tool for flows of practical relevance. Currently, the use of LES for high Reynolds number complex flows is limited by its extraordinary resolution requirements that are present due to the need to resolve the inner wall layer. Models bridging the wall layer are able to solve this resolution dilemma - but currently available wall models suffer from severe constraints. lt is the aim of this proposal to improve existing and to develop novel wall models for LES of complex, high Reynolds number flows. The research will focus on pressure induced separation and reattachment and on the effects of streamwise curvature, axial vorticity and compressibility. It will start from careful a priori testing of existing approaches and an approach, recently proposed by the applicants. The data used will be based on well resolved Direct Numerical Simulations (DNS). Based on the experiences made during these test, a posteriori testing will be made on test cases commonly defined within this French-German research group thus allowing for detailed comparisons of the developed approaches with complementary methods developed by the other members of the research group.

大涡模拟（LES）是预测复杂湍流流动最有前途的方法。通过解决波动量，LES有可能成为一个广泛使用的模拟工具，为实际相关的流动。目前，使用LES的高雷诺数复杂的流动是有限的，由于需要解决的内壁层，目前其非凡的分辨率要求。桥接壁层的模型能够解决这个解决方案的困境-但目前可用的壁模型受到严重的限制。本文的目的是改进现有的壁面模型，并发展新的壁面模型，用于复杂的高雷诺数流动的大涡模拟。研究将集中于压力引起的分离和再附着以及流向曲率、轴向涡量和可压缩性的影响。它将首先对现有办法和申请人最近提出的一种办法进行仔细的先验测试。使用的数据将基于良好解析的直接数值模拟（DNS）。根据在这些测试中取得的经验，将对这个法国-德国研究小组内共同定义的测试案例进行后验测试，从而可以将所开发的方法与研究小组其他成员开发的补充方法进行详细比较。