Dongari, Nishanth and Zhang, Yonghao and Reese, Jason (2011) Molecular free path distribution in rarefied gases. Journal of Physics D: Applied Physics, 44 (12). Article 125502. ISSN 0022-3727
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We present the results of investigations into the distribution of molecular free paths in rarefied gases using molecular dynamics simulations. Our tests on a range of different gas densities and confinements (unbounded, single bounding wall and parallel bounding walls) indicate that the molecules perform Lévy-type flights, irrespective of the presence of a bounding wall. The free paths most closely follow a power-law distribution. Simulations of gases confined by planar surfaces indicate that the local molecular mean free path varies sharply close to a solid surface. These results may yield new insight into diffusive transport in rarefied gases, in particular, the constitutive behaviour of gas flows in micro- and nanoscale devices.
|Notes:||Impact Factor 2.083, Half-Life 5.7|
|Keywords:||molecular free paths, rarefied gases , molecular dynamics simulations , gas flows in micro and nanoscale devices, Mechanical engineering and machinery, Physics|
|Subjects:||Technology > Mechanical engineering and machinery|
Science > Physics
|Department:||Faculty of Engineering > Mechanical and Aerospace Engineering|
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|Depositing user:||Pure Administrator|
|Date Deposited:||15 Mar 2011 05:10|
|Last modified:||07 Dec 2013 00:35|
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