Suspended droplet evaporation in high temperature is common seen and widely used in various industries. Different from the previous lattice Boltzmann model of liquid-vapor phase change, a newly developed model which can consider radiation heat transfer is proposed and used to simulate the suspended droplet evaporation process. This model is verified by the theoretical solutions and compared with the D² law. It is found that the deviation between simulated results and the D² line is much more obvious under high vapor temperature and small droplet size. And, the radiation heat-transfer ratio during droplet evaporation can reach 45.6% in our simulation, which indicates the importance of radiation heat transfer in droplet evaporation and the necessity of coupling radiation heat transfer into the liquid-vapor phase-change model under high temperature. Also, effects of extinction coefficient β and scattering albedo w on evaporation process are discussed by detailed analysis of streamlines and temperature distribution. Our model and results will benefit the understanding of radiation heat transfer in droplet evaporation process.

中文翻译：

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通过开发的格子玻尔兹曼模型研究考虑辐射传热的液滴蒸发

悬浮液滴在高温下蒸发是常见的现象，广泛应用于各行各业。不同于以往的液-气相变格子玻尔兹曼模型，提出了一种新开发的考虑辐射传热的模型，并用于模拟悬浮液滴蒸发过程。该模型通过理论解得到验证，并与D ²定律进行了比较。发现模拟结果与D ^{2之间存在偏差}在高蒸汽温度和小液滴尺寸下，线条更加明显。并且，在我们的模拟中液滴蒸发过程中的辐射传热比可以达到45.6％，这表明辐射传热在液滴蒸发中的重要性以及将辐射传热耦合到高温下液 - 气相变模型的必要性. 此外，通过对流线和温度分布的详细分析，讨论了消光系数β和散射反照率对蒸发过程的影响。我们的模型和结果将有助于理解液滴蒸发过程中的辐射传热。