LESのための流入変動風の生成に関する研究 : 流入変動風を用いた等方性乱流場のLES解析

概要

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The inflow turbulence for LES was generated by means of Hoshiya's method based on Monte-Carlo simulation considering power spectral density and cross spectral density as targets. The generated inflow turbulence was modified to satisfy the continuity equation by the divergence-free operation based on Shirani's method. As a result of these procedures, the level of velocity divergence could be reduced sufficiently and also the spatial correlation and power spectral density obtained from the inflow turbulence agreed well with the prescribed target values. The generated inflow turbulence was used as the inflow boundary condition for computing the decaying isotropic turbulence same with the one measured by G.Comte-Bellot and S.Corrsin to confirm its applicability. The decay of turbulence kinematic energy in streamwise direction was reproduced well by LES using the inflow turbulence.
社団法人日本建築学会の論文
1997-11-30