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      Experiments of Drops Impacting a Smooth Solid Surface: A Model of the Critical Impact Speed for Drop Splashing

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      Physical Review Letters
      American Physical Society (APS)

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          Abstract

          Making use of experimental and theoretical considerations, in this Letter we deduce a criterion to determine the critical velocity for which a drop impacting a smooth dry surface either spreads over the substrate or disintegrates into smaller droplets. The derived equation, which expresses the splash threshold velocity as a function of the material properties of the two fluids involved, the drop radius, and the mean free path of the molecules composing the surrounding gaseous atmosphere, has been thoroughly validated experimentally at normal atmospheric conditions using eight different liquids with viscosities ranging from μ=3×10(-4) to μ=10(-2)  Pa s, and interfacial tension coefficients varying between σ=17 and σ=72  mN m(-1). Our predictions are also in fair agreement with the measured critical speed of drops impacting in different gases at reduced pressures given by Xu et al. [Phys. Rev. Lett. 94, 184505 (2005).

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          Most cited references31

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          DROP IMPACT DYNAMICS: Splashing, Spreading, Receding, Bouncing…

          A.L. Yarin (2006)
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            Boundary-Layer Theory

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              Droplet-wall collisions: Experimental studies of the deformation and breakup process

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                Author and article information

                Journal
                PRLTAO
                Physical Review Letters
                Phys. Rev. Lett.
                American Physical Society (APS)
                0031-9007
                1079-7114
                July 2014
                July 11 2014
                : 113
                : 2
                Article
                10.1103/PhysRevLett.113.024507
                25062193
                e78b994a-ea01-4ef1-b028-b1b5ee4d54ac
                © 2014

                http://link.aps.org/licenses/aps-default-license

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