Large-eddy simulation of turbulent open-channel flow over three-dimensional dunes
Large-eddy simulation of turbulent open-channel flow over three-dimensional dunes
复制标题
三维沙丘明渠湍流流的大涡模拟
DOI:
10.1080/00221686.2013.835287
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发表时间:
2013
影响因子:
2.3
通讯作者:
Xie Z
中科院分区:
文献类型:
--
作者:
Xie Z
A large-eddy simulation study has been undertaken to investigate the turbulent structure of open-channel flow over three-dimensional (3D) dunes. The governing equations have been discretized using the finite volume method, with the partial cell treatment being implemented in a Cartesian grid form to deal with the 3D dune topography. The simulated free surface elevations, mean flow velocities and Reynolds shear stress distributions have been compared with experimental measurements published in the literature. Relatively close agreement has been obtained between the two sets of results. The predicted mean velocity field and the associated turbulence structure are significantly different from those observed for flows over two-dimensional dunes. The effects of dune three-dimensionality are reflected in spanwise variations of mean flow fields, secondary currents and different distributions of vertical profiles of the double-averaged velocity. Furthermore, large-scale vortical structures, such as spanwise rollers and hairpin-like structures, are predicted in the simulations, with most of them being generated in the concave regions of the 3D dunes.
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影响因子:
--
作者:
J. Venditti
通讯作者:
J. Venditti
影响因子:
2.3
作者:
A. Müller;A. Gyr
通讯作者:
A. Gyr
DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
Hiromichi Kobayashi;E. Matsumoto;N. Fukushima;M. Tanahashi;T. Miyauchi
通讯作者:
T. Miyauchi
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
S. Mclean;V. Nikora;S. Coleman
通讯作者:
S. Coleman
DOI:
--
发表时间:
1990
期刊:
影响因子:
--
作者:
C. Mendoza;H. Shen
通讯作者:
H. Shen