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Drag forces on nanoparticles in the free-molecule regime: Effect of the particle temperature.
Physical Review E ( IF 2.2 ) Pub Date : 2020-01-01 , DOI: 10.1103/physreve.101.013103
Jun Wang 1 , Junjie Su 1 , Guodong Xia 1
Affiliation  

In the present paper, we theoretically study the drag force on nanoparticles in the free-molecule regime. It has been widely assumed that the particle temperature is equal to the gas media temperature in the open literature. However, this assumption can be invalid in some real applications. Based on the kinetic theory, we obtain the generalized formulas for the drag force on nanoparticles in the free-molecule regime. It is found that there exists a significant error induced by the assumption of equal temperature between the particle and the surrounding gas. Therefore, it is necessary to consider the effect of the particle temperature in the analysis of the particle transport properties.

中文翻译:

在自由分子状态下对纳米颗粒的阻力:颗粒温度的影响。

在本文中,我们从理论上研究了在自由分子体系中对纳米颗粒的拖曳力。在公开文献中,人们普遍认为颗粒温度等于气体介质温度。但是,此假设在某些实际应用中可能无效。基于动力学理论,我们获得了在自由分子状态下对纳米粒子的阻力的广义公式。发现在粒子与周围气体之间存在相等温度的假设会导致明显的误差。因此,在分析颗粒传输特性时必须考虑颗粒温度的影响。
更新日期:2020-01-08
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