Fine Structure of a Directly Simulated Isotropic Turbulence
Fine Structure of a Directly Simulated Isotropic Turbulence
复制标题
直接模拟各向同性湍流的精细结构
DOI：
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发表时间：
1989
期刊：
影响因子：
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通讯作者：
Kiyoshi Yamamoto
中科院分区：
文献类型：
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作者：
I. Hosokawa;Kiyoshi Yamamoto
对作者最近在超级计算机上实现的各向同性湍流的精细结构进行了充分发展的研究。给出了涡度密集区和高应变区之间的几何关系，以及这些区域中速度矢量和涡量矢量的各种相互取向。揭示了速度(纵向和横向)梯度的空间分布、涡度大小和局部耗散平方根的共同指数性质和细微差别。
The fine structure of the isotropic turbulence, which has recently been realized in a supercomputer by the authors, is studied at its fully-developed state. The geometrical relationship between vorticity-concentrated regions and high-strain regions and a variety of mutual orientations of the velocity and vorticity vectors in these regions are illustrated. A common exponential nature and a delicate difference of the space distributions of the velocity (longitudinal and lateral) gradients, along with the magnitude of vorticity and the square-root of local dissipation, are exposed.