A turbulent quarter century of active grids: from Makita (1991) to the present
A turbulent quarter century of active grids: from Makita (1991) to the present
复制标题
活跃网格的动荡四分之一世纪：从牧田（1991）到现在
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
L. Mydlarski
中科院分区：
文献类型：
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作者：
L. Mydlarski
A quarter of a century ago, following a series of investigations with his colleagues, Makita published a paper (Makita 1991 Fluid Dyn. Res. 8, 53–64) in which the production of high-Reynolds-number, homogeneous, isotropic turbulence in a typical laboratory-sized wind tunnel by way of a novel ‘active grid’ was demonstrated. Until this time, classical (‘passive’) grids had been used to generate homogeneous, isotropic turbulence, which was almost invariably of low Reynolds number. In the years following the publication of Makita’s paper, active grids have played a major role in experimental studies of turbulence, given their ability to generate the most fundamental expression of a turbulent flow (homogeneous, isotropic turbulence) at Reynolds numbers large enough to (i) test Kolmogorov theory (posed in the limit of infinite Reynolds number), and (ii) match those of many natural and industrial flows. The present paper aims to review the research related to active grids undertaken since Makita’s seminal work. To this end, it firstly summarizes the key elements involved in the design, construction and operation of active grids, with the aim of providing a useful reference for those interested in studying or building active grids. Secondly, it discusses how active grids are now being customized to generate novel flows. Lastly, it reviews the accomplishments that have been achieved as a result of the invention of the active grid. It is hoped that the contribution to the field of turbulence brought by active grids a quarter of a century ago will moreover serve to inspire current fluid dynamicists to generate other simple and elegant innovations—like the active grid—to further advance our understanding of turbulent flows.
影响因子：
3.7
作者：
E. Doğan;R. Hanson;B. Ganapathisubramani
通讯作者：
E. Doğan;R. Hanson;B. Ganapathisubramani