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ISSN Печать: 1044-5110
ISSN Онлайн: 1936-2684
Indexed in
EXPERIMENTAL INVESTIGATION OF A SINGLE DROPLET IMPACT ONTO A SESSILE DROP
Краткое описание
This paper presents an experimental study of the impact of a single water droplet onto a stationary liquid bulk built by the previous impact of one or two droplets. The experiments were performed with two different film thicknesses, three different Weber (We) numbers, and two surface contact angles. In both cases we have hydrophilic conditions, which do not allow for a good investigation of this parameter. The morphology of the drop impact was studied using a charge-coupled device (CCD) camera, and the corresponding qualitative and quantitative characteristics regarding the time evolution of the phenomena, such as the diameter and height of the evolving crown, were obtained by image analysis. Analysis of the experimental data evidences that the phenomenon has a strong similarity to the impact of a single drop on shallow films, although the effect of the surface wetting characteristics plays, in this case, a negligible role. The regimes of deposition and splashing are identified as a function of the We number and the maximum thickness of the steady film, which is affected by the surface wettability properties.
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Zuo Han-song, Li He-jun, Qi Le-hua, Luo Jun, Zhong Song-yi, Wu Yao-feng, Effect of non-isothermal deposition on surface morphology and microstructure of uniform molten aluminum alloy droplets applied to three-dimensional printing, Applied Physics A, 118, 1, 2015. Crossref
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Wakefield Jamie, Tilger Christopher F., Oehlschlaeger Matthew A., The interaction of falling and sessile drops on a hydrophobic surface, Experimental Thermal and Fluid Science, 79, 2016. Crossref
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Abouelsoud Mostafa, Li Xing, Peng Leqin, Bai Bofeng, Crown behavior during a concentric collision of a falling droplet onto a sessile droplet, Experiments in Fluids, 59, 11, 2018. Crossref
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Tilger Christopher F., Beacham Sean T., Oehlschlaeger Matthew A., Lateral jetting during off-center drop collisions on substrates, International Journal of Heat and Mass Transfer, 122, 2018. Crossref
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Kumar Manish, Bhardwaj Rajneesh, Sahu Kirti Chandra, Coalescence dynamics of a droplet on a sessile droplet, Physics of Fluids, 32, 1, 2020. Crossref
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Dölle Sarah, Harth Kirsten, John Thomas, Stannarius Ralf, Impact and Embedding of Picoliter Droplets into Freely Suspended Smectic Films, Langmuir, 30, 42, 2014. Crossref
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Dölle Sarah, Stannarius Ralf, Microdroplets Impinging on Freely Suspended Smectic Films: Three Impact Regimes, Langmuir, 31, 23, 2015. Crossref