Calibration and evaluation of a spatial scaling method for the near-wall turbulent flow of viscoelastic fluids
Calibration and evaluation of a spatial scaling method for the near-wall turbulent flow of viscoelastic fluids
复制标题
粘弹性流体近壁湍流空间尺度方法的标定和评估
DOI:
10.1080/14685248.2020.1819541
复制
发表时间:
2020
影响因子:
1.9
通讯作者:
Hayashi Akihiro
中科院分区:
文献类型:
--
作者:
Ohta Takashi;Eguchi Daiki;Hayashi Akihiro
We performed direct numerical simulations of a turbulent channel flow in viscoelastic fluids to assess various spatial scaling methods and to find a scaling method that can visualise the spatial features regardless of fluid properties. The Giesekus and Oldroyd-B models were used as constitutive equations to model the viscoelastic fluids alongside a Newtonian fluid. The initial scaling method that can consider local viscosity variations demonstrated an increase in the size of the velocity streaks and a decrease in the number of quasi-streamwise vortices, with no change in the observed spatial features of the turbulence structures. After scaling using the ratio of the wall friction coefficients, we observed typical spatial features of the principal turbulence structures that coincided with those of the Newtonian fluid. The results indicate that the characteristics peculiar to the turbulent flow of viscoelastic fluids can be predicted in a manner similar to that for Newtonian fluids.
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影响因子:
4.1
作者:
A. Tamura;K. Kikuchi;Tadayasu Takahashi
通讯作者:
Tadayasu Takahashi
DOI:
10.1299/jsmeb.41.830
发表时间:
1998
期刊:
Jsme International Journal Series B-fluids and Thermal Engineering
影响因子:
--
作者:
T. Kajishima;T. Ohta;K. Okazaki;Y. Miyake
通讯作者:
Y. Miyake
影响因子:
2.3
作者:
R. Smith;W. G. Tiederman
通讯作者:
W. G. Tiederman
影响因子:
0.8
作者:
T. Ohta;Y. Usui
通讯作者:
Y. Usui
影响因子:
4.6
作者:
H. Usui;K. Maeguchi;Y. Sano
通讯作者:
Y. Sano