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Nanoscale study of boiling and evaporation in a liquid Ar film on a Pt heater using molecular dynamics simulation

机译:使用分子动力学模拟的纳米级研究Pt加热器上液态Ar膜中的沸腾和蒸发

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摘要

Molecular dynamics simulations have been conducted to understand the mechanism for bubble formation on a platinum substrate with particular emphasis on the surface texture. Liquid Argon, that follows the model of Lennard-Jones fluids, is the fluid of interest. The nano-sized bubbles are formed under different degree of superheat and surface conditions. The bubble nucleation and vapor film formation show dependence on the degree of superheat and solid-liquid interfacial wettability. A bubble does not form easily on a non-wetting surface. It is easy to nucleate a bubble on a smooth surface for higher degree of superheats. The hydrophilic surfaces provide favorable conditions for bubble nucleation and formation of vapor films.
机译:已经进行了分子动力学模拟,以了解在铂基底上形成气泡的机理,并特别强调了表面纹理。遵循Lennard-Jones流体模型的液态氩是关注的流体。纳米气泡是在不同程度的过热和表面条件下形成的。气泡成核和蒸汽膜的形成显示出对过热程度和固液界面润湿性的依赖性。在不湿的表面上不容易形成气泡。容易在光滑的表面上使气泡成核,从而获得更高的过热度。亲水性表面为气泡成核和形成蒸汽膜提供了有利条件。

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