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arXiv 2111.00596physics.flu-dyncond-mat.soft
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变形液态大理石的形成:实验和计算模拟

Deformed liquid marble formation: Experiments and computational modeling

J. R. J. Pritchard, M. V. Chubynsky, J. O. Marston, J. E. Sprittles

摘要:

变形的液体弹珠的形成,通过对粉末床的影响下降进行了分析,使用实验和计算建模方法。在实验上,特别注意确定扩散液滴的最大接触面积与当粉末(潜在地)封装然后固定(“冻结”)液滴的表面以形成液体大理石时液滴的表面积之间的关系,其中扩散液滴的最大接触面积确定液滴的表面能够收获多少粉末。粉末床上的刚性和不可渗透的超疏水性基板上的影响之间的比较显示出良好的协议的参数范围内,并激励发展的第一个数学模型的液体大理石形成的过程中,通过下降的影响。该模型利用实验确定的功能来捕获封装和冻结阈值,并通过表面粘性机制来解释粉末对液滴的影响。流体体积框架中的模拟定性地恢复了实验的许多特征,并突出了应纳入未来分析的物理效应。

英文摘要:

The formation of deformed liquid marbles via impact of drops onto powder beds is analysed using experimental and computational modelling approaches. Experimentally, particular attention is paid to determining a relationship between the maximum contact area of the spreading drops, which determines how much powder the drop's surface is able to harvest, and the drop's surface area when the powder (potentially) encapsulates and then immobilises (`freezes') the surface of the drop to form a liquid marble. Comparisons between impacts on powder beds to those on rigid and impermeable superhydrophobic substrates show good agreement for a range of parameters and motivate the development of the first mathematical model for the process of liquid marble formation via drop impact. The model utilises experimentally-determined functions to capture encapsulation and freezing thresholds and accounts for the powder's influence on the drop via a surface viscous mechanism. Simulations in the volume-of-fluid framework qualitatively recover many features of the experiments and highlight physical effects that should be incorporated into future analyses.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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