Nonwetting of impinging droplets on textured surfaces

Applied Physics Letters - Tập 94 Số 13 - 2009
Tao Deng1, Kripa K. Varanasi2, Ming F. Hsu1, Nitin Bhate1, Chris Keimel1, Judith A. Stein1, Margaret L. Blohm1
1GE Global Research Center 1 Nanotechnology Advanced Technology, , One Research Circle, Niskayuna, New York 12309, USA
2Massachusetts Institute of Technology 2 Department of Mechanical Engineering, , Cambridge, Massachusetts 02139, USA

Tóm tắt

This paper studies the impinging droplets on superhydrophobic textured surfaces and proposes a design guideline for nonwetting surfaces under droplet impingement. A new wetting pressure, the effective water hammer pressure, is introduced in the study to clearly define wetting states for the impinging droplets. This approach establishes the design criteria for nonwetting surfaces to impinging droplets. For impingement speed higher than raindrop speed, the surfaces need to have sub-100-nm features to generate a large enough antiwetting pressure for the droplets to take a nonwetting state after impingement.

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Tài liệu tham khảo

1928, Proc. R. Soc. London, Ser. A, 119, 481, 10.1098/rspa.1928.0107

2008, Phys. Fluids, 20, 092104, 10.1063/1.2978186

1955, J. Res. Natl. Bur. Stand., 54, 281, 10.6028/jres.054.033

2007, Appl. Phys. Lett., 90, 254101, 10.1063/1.2749183

2007, Appl. Phys. Lett., 90, 194103, 10.1063/1.2737360

2007, Appl. Phys. Lett., 91, 023105, 10.1063/1.2756296

1876, Proc. R. Soc. London, 25, 261, 10.1098/rspl.1876.0048

2006, Europhys. Lett., 74, 299, 10.1209/epl/i2005-10522-3

2008, Langmuir, 24, 6262, 10.1021/la8003504

2006, Europhys. Lett., 74, 306, 10.1209/epl/i2005-10523-2

2008, Proc. Natl. Acad. Sci. U.S.A., 105, 18200, 10.1073/pnas.0804872105

1997, Planta, 202, 1, 10.1007/s004250050096

2004, Langmuir, 20, 7097, 10.1021/la049329e

2008, J. Mater. Chem., 18, 3841, 10.1039/b805433a

2008, MRS Bull., 33, 752, 10.1557/mrs2008.161

1964, Proc. R. Soc. London, Ser. A, 282, 331, 10.1098/rspa.1964.0236

1999, Wear, 233, 1, 10.1016/S0043-1648(99)00189-1

1983, Annu. Rev. Fluid Mech., 15, 97, 10.1146/annurev.fl.15.010183.000525

1972, J. Acoust. Soc. Am., 52, 1442, 10.1121/1.1913258

1972, J. Appl. Meteorol., 11, 877, 10.1175/1520-0450(1972)011<0877:TFOR>2.0.CO;2

2007, Nature Mater., 6, 782, 10.1038/nmat1974

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Applied Physics Letters

Tập 94 Số 13

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