Large eddy simulation of the fluid–structure interaction in an abstracted aquatic canopy consisting of flexible blades
Large eddy simulation of the fluid–structure interaction in an abstracted aquatic canopy consisting of flexible blades
复制标题
由柔性叶片组成的抽象水生冠层中流体结构相互作用的大涡模拟
DOI:
10.1017/jfm.2020.858
复制
发表时间:
2021
影响因子:
3.7
通讯作者:
Jochen Fröhlich
中科院分区:
文献类型:
--
作者:
Silvio Tschisgale;Bastian Löhrer;Richard Meller;Jochen Fröhlich
The paper addresses the fluid–structure interaction of submerged aquatic canopies, with particular focus on the complex interplay between coherent flow structures and the motion of vegetation elements. New insights into the underlying mechanisms are gained from a large eddy simulation of a submerged model canopy flow. The model canopy is made up of 800 highly flexible blades, each individually resolved by an immersed boundary method. The obtained high-resolution flow data reveal well-known coherent turbulent structures, including velocity streaks, Kelvin–Helmholtz (KH) vortices in the mixing layer as well as hairpin (HP) vortices in the outer flow region. The present results show that the interaction of these prototypical structures plays a key role creating unique turbulent features such as composite KH/HP vortices located between a high-speed and low-speed streak. Under the influence of these pronounced eddies, groups of blades respond by a strong local reconfiguration. Due to the convection of the coherent structures by the mean flow this causes an apparent wave-like motion of the canopy in streamwise direction, known as monami. A frequency analysis of this phenomenon shows that the vegetation responds almost passively, merely reflecting local flow conditions.
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影响因子:
2.8
作者:
Silvio Tschisgale;Louis Thiry;Jochen Fröhlich
通讯作者:
Jochen Fröhlich
DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
Ravikant Singh;M. Bandi;A. Mahadevan;S. Mandre
通讯作者:
S. Mandre
DOI:
--
发表时间:
1978
期刊:
影响因子:
--
作者:
R. G. Dong
通讯作者:
R. G. Dong
DOI:
--
发表时间:
2010
期刊:
--
影响因子:
--
作者:
T. Okamoto;I. Nezu
通讯作者:
T. Okamoto;I. Nezu
影响因子:
4.7
作者:
B. Vowinckel;T. Kempe;J. Fröhlich
通讯作者:
J. Fröhlich