Effects of Wavenumber Truncation on High-Resolution Direct Numerical Simulation of Turbulence
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概要
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The effects of wavenumber truncation on the direct numerical simulation (DNS) of incompressible turbulence at high Reynolds numbers using the Fourier spectral method were studied by comparing DNS fields with different truncation wavenumbers, K_<max>. The comparison suggests that the error due to truncation increases faster at higher wavenumbers, k, and the increase obeys a simple scaling law in the inertial subrange k≪K_<max>. Some statistics, such as the energy and dissipation spectra, may remain insensitive to the error, even in the later period, provided that K_<max>η〜1(η is the Kolmogorov length scale), although DNS fields with different K_<max> are then essentially uncorrelated to each other.
- 社団法人日本物理学会の論文
- 2002-03-15
著者
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Yamazaki Yosuke
Department Of Natural Science Kochi University
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Yamazaki Yosuke
Department Of Computational Science And Engineering Graduate School Of Engineering Nagoya University
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KANEDA Yukio
Department of Applied Physics,Faculty of Engineering,Nagoya University
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ISHIHARA Takashi
Department of Computational Science and Engineering, Graduate School of Engineering, Nagoya Universi
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Kaneda Yukio
Department Of Applied Physics Faculty Of Engineering Nagoya University
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Ishihara Takashi
Department Of Applied Physics Nagoya University
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