TY - JOUR
T1 - Reynolds number dependency of small scale structures in steady anisotropic turbulence produced by implicit large-eddy simulation
AU - Oshibuchi, Mayuka
AU - Suzuki, Hiroki
AU - Mochizuki, Shinsuke
N1 - Funding Information:
This work was supported in part by the Japanese Ministry of Education, Culture, Sports, Science and Technology through Grants-in-Aid (Nos. 18H01369, 18K03932, 20H02069, and 21K03859).
Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2021/7/27
Y1 - 2021/7/27
N2 - This study presents small-scale fluctuation characteristics of anisotropic steady turbulence reproduced by implicit large eddy simulation (LES). The Reynolds number dependence of this small-scale fluctuation characteristic is approached in this study. This study focuses on that, a small scale turbulence field is not needed to be isotropic if the Reynolds number is sufficiently high. The anisotropic steady turbulence is maintained steady by using the forcing terms in the governing equations. The results of the implicit LES are compared with those obtained by direct numerical simulation (DNS) and LES based on the Smagorinsky model. Spatial derivatives are discretized using a fourth-order central difference scheme that conserves the kinetic energy of the turbulence field. The governing equations are integrated for the temporal direction using the fourth-order Runge-Kutta method. The results of enstrophy and small-scale turbulence characteristics quantified by the isotropy parameter are found to be consistent between the implicit LES and DNS.
AB - This study presents small-scale fluctuation characteristics of anisotropic steady turbulence reproduced by implicit large eddy simulation (LES). The Reynolds number dependence of this small-scale fluctuation characteristic is approached in this study. This study focuses on that, a small scale turbulence field is not needed to be isotropic if the Reynolds number is sufficiently high. The anisotropic steady turbulence is maintained steady by using the forcing terms in the governing equations. The results of the implicit LES are compared with those obtained by direct numerical simulation (DNS) and LES based on the Smagorinsky model. Spatial derivatives are discretized using a fourth-order central difference scheme that conserves the kinetic energy of the turbulence field. The governing equations are integrated for the temporal direction using the fourth-order Runge-Kutta method. The results of enstrophy and small-scale turbulence characteristics quantified by the isotropy parameter are found to be consistent between the implicit LES and DNS.
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U2 - 10.1088/1742-6596/1978/1/012021
DO - 10.1088/1742-6596/1978/1/012021
M3 - Conference article
AN - SCOPUS:85112436260
VL - 1978
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - 1
M1 - 012021
T2 - 4th International Conference on Physics, Mathematics and Statistics, ICPMS 2021
Y2 - 19 May 2021 through 21 May 2021
ER -