TY - JOUR
T1 - Large-eddy simulation of turbulent channel flows with conservative IDO scheme
AU - Onodera, Naoyuki
AU - Aoki, Takayuki
AU - Kobayashi, Hiromichi
N1 - Funding Information:
This research was supported in part by KAKENHI , Grant-in-Aid for Scientific Research (B) 19360043 from The Ministry of Education, Culture, Sports, Science and Technology (MEXT), JST-CREST project “ULP-HPC: Ultra Low-Power, High Performance Computing via Modeling and Optimization of Next Generation HPC Technologies” from Japan Science and Technology Agency (JST) and JSPS Global COE program “Computationism as a Foundation for the Sciences” from Japan Society for the Promotion of Science (JSPS).
PY - 2011/6/20
Y1 - 2011/6/20
N2 - The resolution of a numerical scheme in both physical and Fourier spaces is one of the most important requirements to calculate turbulent flows. A conservative form of the interpolated differential operator (IDO-CF) scheme is a multi-moment Eulerian scheme in which point values and integrated average values are separately defined in one cell. Since the IDO-CF scheme using high-order interpolation functions is constructed with compact stencils, the boundary conditions are able to be treated as easy as the 2nd-order finite difference method (FDM). It is unique that the first-order spatial derivative of the point value is derived from the interpolation function with 4th-order accuracy and the volume averaged value is based on the exact finite volume formulation, so that the IDO-CF scheme has higher spectral resolution than conventional FDMs with 4th-order accuracy. The computational cost to calculate the first-order spatial derivative with non-uniform grid spacing is one-third of the 4th-order FDM. For a large-eddy simulation (LES), we use the coherent structure model (CSM) in which the model coefficient is locally obtained from a turbulent structure extracted from a second invariant of the velocity gradient tensor, and the model coefficient correctly satisfies asymptotic behaviors to walls.The results of the IDO-CF scheme with the CSM for turbulent channel flows are compared to the FDM with the CSM and dynamic Smagorinsky model as well as the direct numerical simulation (DNS) by Moser et al. Adding the sub-grid scale stress tensor of LES to the IDO-CF scheme improves the profile of the mean velocity in comparison with an implicit eddy viscosity of the IDO-CF upwind scheme. The IDO-CF scheme with the CSM gives better turbulent intensities than conventional FDMs with the same number of grid points. The turbulent statistics calculated by IDO-CF scheme are in good agreement with the DNS at the various values of Reynolds number Reτ=180,395, and 590. It is found that the IDO-CF scheme is suitable for the turbulent flow computation and improves the turbulent statistics with compact stencils.
AB - The resolution of a numerical scheme in both physical and Fourier spaces is one of the most important requirements to calculate turbulent flows. A conservative form of the interpolated differential operator (IDO-CF) scheme is a multi-moment Eulerian scheme in which point values and integrated average values are separately defined in one cell. Since the IDO-CF scheme using high-order interpolation functions is constructed with compact stencils, the boundary conditions are able to be treated as easy as the 2nd-order finite difference method (FDM). It is unique that the first-order spatial derivative of the point value is derived from the interpolation function with 4th-order accuracy and the volume averaged value is based on the exact finite volume formulation, so that the IDO-CF scheme has higher spectral resolution than conventional FDMs with 4th-order accuracy. The computational cost to calculate the first-order spatial derivative with non-uniform grid spacing is one-third of the 4th-order FDM. For a large-eddy simulation (LES), we use the coherent structure model (CSM) in which the model coefficient is locally obtained from a turbulent structure extracted from a second invariant of the velocity gradient tensor, and the model coefficient correctly satisfies asymptotic behaviors to walls.The results of the IDO-CF scheme with the CSM for turbulent channel flows are compared to the FDM with the CSM and dynamic Smagorinsky model as well as the direct numerical simulation (DNS) by Moser et al. Adding the sub-grid scale stress tensor of LES to the IDO-CF scheme improves the profile of the mean velocity in comparison with an implicit eddy viscosity of the IDO-CF upwind scheme. The IDO-CF scheme with the CSM gives better turbulent intensities than conventional FDMs with the same number of grid points. The turbulent statistics calculated by IDO-CF scheme are in good agreement with the DNS at the various values of Reynolds number Reτ=180,395, and 590. It is found that the IDO-CF scheme is suitable for the turbulent flow computation and improves the turbulent statistics with compact stencils.
KW - Coherent structure model
KW - IDO scheme
KW - Large-eddy simulation
KW - Multi-moment scheme
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U2 - 10.1016/j.jcp.2011.04.004
DO - 10.1016/j.jcp.2011.04.004
M3 - Article
AN - SCOPUS:79955720071
SN - 0021-9991
VL - 230
SP - 5787
EP - 5805
JO - Journal of Computational Physics
JF - Journal of Computational Physics
IS - 14
ER -