Fluid–particle interaction in turbulent open channel flow with fully-resolved mobile beds
Fluid–particle interaction in turbulent open channel flow with fully-resolved mobile beds
复制标题
湍流明渠流中的流体颗粒与完全解析的移动床的相互作用
DOI:
10.1016/j.advwatres.2014.04.019
复制
发表时间:
2014
影响因子:
4.7
通讯作者:
J. Fröhlich
中科院分区:
文献类型:
--
作者:
B. Vowinckel;T. Kempe;J. Fröhlich
The paper presents Direct Numerical Simulations of an open channel flow laden with spherical particles at a bulk Reynolds number of 2941. The transport of thousands of mobile particles is simulated propagating over a rough bed which consists of immobile particles of the same size in hexagonal ordering. An Immersed Boundary Method is used for the numerical representation of the particles. With 22 points per diameter even the viscous scales of the flow are resolved at this Reynolds number. The reference run contains just as many fixed as mobile particles with a relative density slightly above the nominal threshold of incipient motion. Further runs were conducted with decreased mass loading and decreased Shields number together with a simulation containing only immobile particles. The variation of the parameters defining the mobile sediment yields a strong modification of particle–fluid as well as particle–particle interactions yielding different structures in space and time. This is assessed by means of appropriate statistical quantities addressing the continuous and the disperse phase. The results are in qualitative agreement with experimental observations at higher Reynolds number.
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影响因子:
3.7
作者:
Clemens Chan-Braun;Manuel Garc'ia-Villalba;M. Uhlmann
通讯作者:
Clemens Chan-Braun;Manuel Garc'ia-Villalba;M. Uhlmann
影响因子:
2.3
作者:
S. Cameron;V. Nikora;S. Coleman
通讯作者:
S. Coleman
影响因子:
3.8
作者:
Tobias Kempe;B. Vowinckel;J. Fröhlich
通讯作者:
Tobias Kempe;B. Vowinckel;J. Fröhlich
DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
R. Munoz
通讯作者:
R. Munoz
DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
B. Vowinckel;Tobias Kempe;J. Fröhlich;V. Nikora
通讯作者:
V. Nikora