Direct control of the small-scale energy balance in two-dimensional fluid dynamics
Direct control of the small-scale energy balance in two-dimensional fluid dynamics
复制标题
二维流体动力学中小尺度能量平衡的直接控制
DOI:
10.1017/jfm.2015.526
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发表时间:
2015
影响因子:
3.7
通讯作者:
Frank J
中科院分区:
文献类型:
--
作者:
Frank J
We explore the direct modification of the pseudo-spectral truncation of two-dimensional, incompressible fluid dynamics to maintain a prescribed kinetic energy spectrum. The method provides a means of simulating fluid states with defined spectral properties, for the purpose of matching simulation statistics to given information, arising from observations, theoretical prediction or high-fidelity simulation. In the scheme outlined here, Nosé–Hoover thermostats, commonly used in molecular dynamics, are introduced as feedback controls applied to energy shells of the Fourier-discretized Navier–Stokes equations. As we demonstrate in numerical experiments, the dynamical properties (quantified using autocorrelation functions) are only modestly perturbed by our device, while ensemble dispersion is significantly enhanced compared with simulations of a corresponding truncation incorporating hyperviscosity.
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影响因子:
8.6
作者:
J. Audretsch
通讯作者:
J. Audretsch
DOI:
--
发表时间:
2003
影响因子:
11.1
作者:
R. Abramov;A. Majda
通讯作者:
A. Majda
DOI:
10.1016/j.jcp.2007.09.002
发表时间:
2007
期刊:
J. Comput. Phys.
影响因子:
--
作者:
S. Dubinkina;J. Frank
通讯作者:
J. Frank
DOI:
10.1016/j.jcp.2009.12.012
发表时间:
2009
期刊:
J. Comput. Phys.
影响因子:
--
作者:
S. Dubinkina;J. Frank
通讯作者:
J. Frank
影响因子:
1.6
作者:
Leimkuhler, Ben;Noorizadeh, Emad;Theil, Florian
通讯作者:
Theil, Florian