Turbulent secondary motions over walls with spanwise inhomogeneity

跨壁的湍流二次运动，具有展向不均匀性

• 批准号: 423710075
• 负责人: Professorin Dr.-Ing. Bettina Frohnapfel
• 金额: --
• 依托单位: Institut für Strömungsmechanik (ISTM)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2019
• 资助国家: 德国
• 起止时间: 2018-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/423710075?language=en
• 关键词: Turbulent; secondary; motions; over; walls

If turbulent flow is exposed to a wall with inhomogeneous boundary conditions in the spanwise direction, large scale vortical structures may develop. These structures influence the heat and mass transfer near the wall and are therefore of great importance for a variety of different natural and technological flows. Within this project the development of those secondary motions and the related influence on the transport of a passive scalar is investigated based on numerical experiments with varying boundary conditions. Based on the gained knowledge it will become possible to develop improved predictive models for the appearance of secondary motions and to generate ideas for the targeted manipulation of fluid flows.

如果湍流在展向上暴露在具有非均匀边界条件的壁面上，可能会形成大规模的涡结构。这些结构影响壁面附近的传热和传质，因此对各种不同的自然和技术流动非常重要。在本项目中，基于不同边界条件的数值实验，研究了这些二次运动的发展及其对被动标量输运的相关影响。基于所获得的知识，将有可能为二次运动的出现开发改进的预测模型，并为有针对性地操纵流体流动产生想法。