Evaluation of Energy Transfer between Grid Scale and Subgrid Scale by Use of Direct Numerical Simulation Data Base
Evaluation of Energy Transfer between Grid Scale and Subgrid Scale by Use of Direct Numerical Simulation Data Base
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利用直接数值模拟数据库评估电网规模和次电网规模之间的能量传输
DOI：
10.1299/jsmeb.40.343
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
Takashi Kakuwa
中科院分区：
文献类型：
--
作者：
T. Miyauchi;M. Tanahashi;Takashi Kakuwa
通过对均匀各向同性湍流和湍流混合层的直接数值模拟，研究了大涡模拟中网格尺度(GS)和亚网格尺度(SGS)应力引起的能量传递。从本研究的结果可以得出以下结论。(1)从能量转移的角度来看，Leonard项和Cross项之间不存在相关性。(2)雷诺项的Smagorinsky模型预测的能量传递比由Dns数据得到的能量传递要大。(3)雷诺项和交叉项的Bardina模型预测了高波数区从SGS到GS的巨大能量转移，这表明Bardina模型在高波数区域引起了过度的后向散射。
Energy transfer between grid scale(GS)and subgrid scale(SGS)induced by SGS stress in large eddy simulation is investigated by direct numerical simulation of homogeneous isotropic turbulence and a turbulent mixing layer. From the results of this study, the following conclusions were reached. (1)No correlation between the Leonard term and Cross term exists from the viewpoint of energy transfer. (2)The Smagorinsky model for the Reynolds term predicts very large energy transfer compared with that obtained from the DNS data. (3)The Bardina models for the Reynolds term and Cross term predict large energy transfer from SGS to GS in the high wave number region, which indicates that the Bardina model causes excessive backward scattering in the high wave number region.