An Application of the Modified Zero-Fourth -Cumulant Approximation to Homogeneous Axisymmetric Boussinesq Turbulence
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概要
- 論文の詳細を見る
Dynamical equations governing the energy, temperature and heat-flux spectrain homogeneous axisymmetric Boussinesq turbulence are formulated by applyingthe modified zero-fourth-cumulant approximation. For nearly-isotropic tur-bulence with a weak buoyancy force, it is shown that they are reduced to theequations of turbulent field convecting a passive scalar. For this case, numericalcalculations are performed to determine the spectra at the Reynolds number 32,Rayleigh number 100 and Plandtl number unity. The results show that the ap-proach to isotropy seems rather slow. The temperature and heat-flux spectraindicate that there are several subranges of the wavenumbers governed by dif-ferent similarity laws. Also the heat-flux spectrum is found to have a sharp peakwhich shifts toward the low-wavenumber range.
- 社団法人日本物理学会の論文
- 1983-02-15
著者
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SAITO Yoshio
Department of General Education,Faculty of Medical Science,Toho University
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NAKAUCHI Norihiko
Department of General Education,Faculty of Medical Science,University of Toho
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Nakauchi Norihiko
Department Of General Education Faculty Of Medical Science University Of Toho
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Saito Yoshio
Department Of Electronics And Information Science Kyoto Institute Of Technology
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Saito Yoshio
Department Of General Education Faculty Of Medical Science University Of Toho
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SAITO Yoshio
Department of Chemistry, Faculty of Science and Technology, Keio Univerisity
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