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Substantial drag reduction in turbulent flow using liquid-infused surfaces
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Journal Article
Substantial drag reduction in turbulent flow using liquid-infused surfaces
2017
Overview
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
$100~\\unicode[STIX]{x03BC}\\text{m}$
to
$800~\\unicode[STIX]{x03BC}\\text{m}$
, 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
$w^{+}\\approx 35$
.
