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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Abstract
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.
| Item type: | Article |
|---|---|
| ID code: | 29474 |
| 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 ?? 118 ?? |
| Related URLs: | |
| Depositing user: | Pure Administrator |
| Date Deposited: | 15 Mar 2011 05:10 |
| Last modified: | 12 Jun 2013 10:35 |
| URI: | http://strathprints.strath.ac.uk/id/eprint/29474 |
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