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.

如果将湍流暴露于沿跨度方向上的不均匀边界条件的壁，则可能会形成大规模的涡流结构。这些结构会影响墙壁附近的热量和传质，因此对于各种不同的自然和技术流都非常重要。在该项目中，根据具有不同边界条件的数值实验，研究了这些次要运动的发展以及对被动标量传输的相关影响。基于获得的知识，将有可能开发出改进的预测模型，以表现出次要动作的出现，并为有针对性的流体流动而产生想法。