Direct-numerical and large-eddy simulations of a non-equilibrium turbulent Kolmogorov flow
Direct-numerical and large-eddy simulations of a non-equilibrium turbulent Kolmogorov flow
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发表时间：
1999-12
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通讯作者：
S. Woodruff;J. Shebalin;M. Hussaini
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作者：
S. Woodruff;J. Shebalin;M. Hussaini
通过改变空间周期强迫的幅值，建立了湍流Kolmogorov流的非平衡形式。结果表明，随着强迫波数的增加，流动对这种瞬时变化的响应变得更加剧烈，同时，大涡模拟结果与直接数值模拟结果的一致性降低。
A non-equilibrium form of turbulent Kolmogorov flow is set up by making an instantaneous change in the amplitude of the spatially-periodic forcing. It is found that the response of the flow to this instantaneous change becomes more dramatic as the wavenumber of the forcing is increased, and, at the same time, that the faithfulness with which the large-eddy-simulation results agree with the direct-numerical results decreases.