著者

蔦原 道久

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集B編 (ISSN:18848346)

巻号頁・発行日

vol.77, no.784, pp.2367-2378, 2011 (Released:2011-12-25)

参考文献数

78

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The lattice Boltzmann method is briefly described from its basic theory to some applications. The basic equations, the discrete BGK equations, are introduced, and the concept of this method is explained Two types of models, that are non-thermal and thermal models exist, and some thermal flows are simulated by two-particle models. Examples of the aero-acoustics and the multi-phase flows are shown. Some new topics are also briefly described, and the references are presented.

著者

平石 雅之 蔦原 道久

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. B編 (ISSN:03875016)

巻号頁・発行日

vol.74, no.746, pp.2132-2137, 2008-10-25

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We propose the Spectral Lattice Boltzmann Method (SLBM) that is the numerical calculation method of fluids based on the lattice BGK (Bathnagar Gross Krook) model discretized with spectral method. Two dimensional homogeneous isotropic turbulence are simulated by the SLBM. Numerical results agree with another calculation results i.e. the energy spectra proportional to the wave number to -4 and backward cascade of energy is observed. As a result, we obtain the conclusion that homogeneous isotropic turbulence can be simulated by the SLBM, and it is confirmed that this method is useful for numerical simulations of turbulent flows.

著者

平石 雅之 蔦原 道久

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 B編 (ISSN:03875016)

巻号頁・発行日

vol.74, no.746, pp.2132-2137, 2008

被引用文献数

2

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We propose the Spectral Lattice Boltzmann Method (SLBM) that is the numerical calculation method of fluids based on the lattice BGK (Bathnagar-Gross-Krook) model discretized with spectral method. Two-dimensional homogeneous isotropic turbulence are simulated by the SLBM. Numerical results agree with another calculation results i.e. the energy spectra proportional to the wave number to -4 and backward cascade of energy is observed. As a result, we obtain the conclusion that homogeneous isotropic turbulence can be simulated by the SLBM, and it is confirmed that this method is useful for numerical simulations of turbulent flows.

著者

蔦原 道久 木村 雄吉 盧 基徳

出版者

公益社団法人 日本マリンエンジニアリング学会

雑誌

日本舶用機関学会誌 (ISSN:03883051)

巻号頁・発行日

vol.23, no.8, pp.474-479, 1988-08-01 (Released:2010-05-31)

参考文献数

14

被引用文献数

2 2

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A two-dimensional model of the Weis-Fogh mechanism, which is a mechanism of hovering flight of small insects, is applied to ship propulsion. A model of the propulsion mechanism consisting of one or two wings in a square channel is proposed. The thrust and the drag on the wing, which are defined, respectively, the force in the direction of progress of the ship and that of movement of the wing, are measured. The propulsive efficiency is calculated and is high when the moving speed of the wing is small compared with the advancing speed of the ship. A model ship equipped with this propulsion mechanism is made and working tests performed. The applicability of this propulsion mechanism to actual ships is expected to be good.