期刊
JOURNAL OF FLUID MECHANICS
卷 827, 期 -, 页码 448-456出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/jfm.2017.503
关键词
drag reduction; turbulence control; turbulent flows
资金
- Office of Naval Research through MURI grant [N00014-12-1-0875, N00014-12-1-0962]
Experiments are presented that demonstrate how liquid-infused surfaces can reduce turbulent drag significantly in Taylor-Couette flow. The test liquid was water, and the test surface was composed of square microscopic grooves measuring 100 mu m to 800 mu m, filled with alkane liquids with viscosities from 0.3 to 1.4 times that of water. We achieve drag reduction exceeding 35 %, four times higher than previously reported for liquid-infused surfaces in turbulent flow. The level of drag reduction increased with viscosity ratio, groove width, fluid area fraction and Reynolds number. The optimum groove width was given by w(+) approximate to 35.
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