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Dynamics of spreading of impinged droplets on the curved-grooved surface

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Abstract

Impact of droplets on rough surfaces has many industrial applications. Various types of splashing and spreading of liquid droplets result due to impingement of the droplets on the different surfaces incorporating formation of satellite droplets. Dynamics of splashing and spreading is different with respect to the point of impact—groove or hill—on the grooved surface. Physics of spreading of impacted droplets on the curved-grooved surfaces is not known so far. Impact of droplets on curved-grooved surface has been studied for a narrow range of Weber number to know the abrupt change in projected area of splashed droplets. Such abrupt change in the geometry of splashed droplets due to exaggerated elongation in the direction of groove was observed for narrow range of Weber numbers from 42 to 45. The present findings explore new direction for further fundamental research work to comprehend the physics of dynamics of impacted droplets for development of new theory helpful for spray painting, printing, and designing of shielding structures.

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Acknowledgements

Author gratefully acknowledges Prof. Omar K. Matar, Imperial College, London for fruitful discussions and suggestions provided for the work; Prof. Geoffrey Evans, University of Newcastle for his useful discussions and overview of the work. Acknowledgements are due to Sardar Vallabhbhai National Institute of Technology (SVNIT)-Surat for providing support for the experimental work. Thanks are due to Prof. Z. V. P. Murthy, SVNIT-Surat for extending the experimental facilities.

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  1. Chemical Engineering Department, Sardar Vallabhbhai National Institute of Technology-Surat, Ichchhanath, Surat, 395007, Gujarat, India

    V. N. Lad

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Correspondence to V. N. Lad.

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Technical Editor: Jader Barbosa Jr.

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Lad, V.N. Dynamics of spreading of impinged droplets on the curved-grooved surface. J Braz. Soc. Mech. Sci. Eng. 39, 3911–3918 (2017). https://doi.org/10.1007/s40430-017-0846-1

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