Assessment of the Generalized Scale-Similarity Model in Compressible Homogeneous Isotropic Turbulence
Assessment of the Generalized Scale-Similarity Model in Compressible Homogeneous Isotropic Turbulence
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DOI：
10.1143/jpsj.73.2732
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发表时间：
2004-10
影响因子：
1.7
通讯作者：
T. Itami;K. Horiuti
中科院分区：
文献类型：
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作者：
T. Itami;K. Horiuti
本文通过与已有的动态亚网格应力模型的比较，对中高雷诺数可压缩均匀各向同性湍流中的广义尺度相似模型(CB-C S模型)进行了评价。先验检验表明，用CB-C S模型估计的SGS应力与精确值最接近，而用CB-C S模型最准确地预测了次电网尺度能量与电网尺度能量之间的能量传递。在实际的大涡模拟中，结果表明，用C-B-C S模型预报的湍流能量发展和涡管等湍流结构的演变与过滤后的数值模拟结果接近。探讨了尺度相似模型精度高的主要原因。
In the present work we carried out the assessment of the generalized scale-similarity model ( C B - C S ) in compressible homogeneous isotropic turbulence at moderately high Reynolds numbers, by comparing with previous dynamic subgrid-scale (SGS) stress models. In an a priori test, it was shown that the SGS stress estimated using the C B - C S model had the closest agreement with the exact value, and the energy transfer between subgrid-scale energy and grid-scale energy was most accurately predicted using the C B - C S model. In an actual large-eddy simulation, it was shown that both the development of turbulent energy and the evolution of the turbulent structure, such as the vortex tube, predicted using the C B - C S model were close to those of the filtered DNS data. The primary cause for a high accuracy of the scale-similarity model was explored.