Spatial relationship between energy dissipation and vortex tubes in channel flow

被引：0
|
作者：
曹列凯 [1 ]
李丹勋 [1 ]
陈槐 [2 ]
刘春晶 [3 ]
机构：
[1] State Key Laboratory of Hydroscience and Engineering Tsinghua University
[2] State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Nanjing Hydraulic Research Institute
[3] State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resource and Hydraulic Research
来源：
JournalofHydrodynamics | 2017年 / 29卷 / 04期
关键词：
Energy dissipation; vortex; channel flow; swirling strength; turbulent structure;
D O I：
暂无
中图分类号：
O35 [流体力学];
学科分类号：
080103 ; 080704 ;
摘要：
The spatial relationship between the energy dissipation slabs and the vortex tubes is investigated based on the direct numerical simulation(DNS) of the channel flow. The spatial distance between these two structures is found to be slightly greater than the vortex radius. Comparison of the core areas of the vortex tubes and the dissipation slabs gives a mean ratio of 0.16 for the mean swirling strength and that of 2.89 for the mean dissipation rate. These results verify that in the channel flow the slabs of intense dissipation and the vortex tubes do not coincide in space. Rather they appear in pairs offset with a mean separation of approximately 10η.
引用
收藏
页码：575 / 585
页数：11
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