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摘要:
The concept of field synergy for fluid flow is introduced, which refers to the synergy of the velocity field and the velocity gradient field in an entire flow domain. Analyses show that the flow drag depends not only on the velocity and the velocity gradient fields but also on their synergy. The principle of minimum dissipation of mechanical energy is developed, which may be stated as follows: the worse the synergy between the velocity and velocity gradient fields is, the smaller the resistance becomes. Furthermore, based on the principle of minimum dissipation of mechanical energy together with conservation equations, a field synergy equation with a set of specified constraints has been established for optimizing flow processes. The optimal flow field can be obtained by solving the field synergy equation, which leads to the minimum resistance to fluid flow in the fixed flow domain. Finally, as an example, the field synergy analysis for duct flow with two parallel branches is presented. The optimized velocity distributor nearby the fork, which was designed based on the principle of minimum dissipation of mechanical energy, may reduce the drag of duct flow with two parallel branches.
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篇名 Fluid flow field synergy principle and its application to drag reduction
来源期刊 科学通报(英文版) 学科
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年,卷(期) 2008,(11) 所属期刊栏目
研究方向 页码范围 1768-1772
页数 5页 分类号
字数 语种 英文
DOI 10.1007/s11434-008-0237-1
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科学通报(英文版)
半月刊
1001-6538
11-1785/N
大16开
北京东黄城根北街16号
2-177
1950
eng
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9507
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