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首页> 外文期刊>Bulletin of the American Physical Society >APS -70th Annual Meeting of the APS Division of Fluid Dynamics- Event - High-speed micro-droplet impact on a super-heated surface
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APS -70th Annual Meeting of the APS Division of Fluid Dynamics- Event - High-speed micro-droplet impact on a super-heated surface

机译:APS-流体动力学APS部门第70届年会-事件-过热表面上的高速微滴撞击

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In this study, we experimentally show that the condition for micro-droplets to splash depends on the temperature of the surface on which the droplets impact. We vary droplet diameter (30$sim$120 $mu$m) and surface temperature (20$sim$500$^{circ}$C). For an impacting droplet, splashing becomes possible for high surface temperature $T>$160$^{circ}$C and Weber number $We>$100. In contrast, at low surface temperature $T<$140$^{circ}$C, no splash was observed up to the maximum Weber number in our experiments, i.e. $Wesim$7,000. Our results show that the criteria for splashing of micro-droplets may be different from those of milli-sized droplets, in particular when the impacted surface is heated.
机译:在这项研究中,我们通过实验证明了微滴飞溅的条件取决于液滴撞击表面的温度。我们改变液滴直径(30 $ sim $ 120 $ mu $ m)和表面温度(20 $ sim $ 500 $ ^ {circ} $ C)。对于冲击液滴,高表面温度$ T> $ 160 $ ^ {circ} $ C和韦伯数$ We> $ 100时可能会发生飞溅。相反,在低表面温度$ T <$ 140 $ ^ {circ} $ C时,在我们的实验中,未观察到飞溅到最大韦伯数,即$ Wesim $ 7,000。我们的结果表明,飞溅微滴的标准可能不同于毫米滴的标准,特别是当受冲击的表面被加热时。

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