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dc.contributor.authorXie, Jianfei
dc.date.accessioned2020-05-07T13:01:07Z
dc.date.available2020-05-07T13:01:07Z
dc.date.issued2020-05-07
dc.identifier.citationXie, J. (2020). 'A mean free path approach to the micro/nanochannel gas flows'. Advances in Aerodynamics, 2(11), pp. 1-15.en_US
dc.identifier.doi10.1186/s42774-020-00035-w
dc.identifier.urihttp://hdl.handle.net/10545/624793
dc.description.abstractWe investigate the gas flows near to solid surfaces in terms of the local spatial variation in the molecular mean free path (MFP). Molecular dynamics (MD) is the appropriate scientific tool for obtaining molecularly-accurate dynamic information in micro and nano-scale gas flows, and has been used to evaluate the molecular mean free path of gases. In the calibration procedure, the viscosity of a gas in the homogeneous case can be recovered in our MD simulations and reach good agreement with the theoretical prediction and data from NIST. In surface-bounded gas flows, if the collisions between gas molecules and walls are counted, a spatially-varying mean free path is presented, and for the first time we have observed that the distribution of the free paths deviates from the exponential one and spikes appear in their distributions at larger Kn, i.e. in the transition flow regime. Based on elementary kinetic theory, the effective viscosity of the gas derived from the mean free path has been incorporated into the framework of the continuum-fluid dynamics equations, and micro-Couette flows are performed to demonstrate this potential application.en_US
dc.description.sponsorshipUK’s Engineering and Physical Sciences Research Council (EPSRC) via grant no. EP/N016602/1.en_US
dc.language.isoenen_US
dc.publisherSpringer Natureen_US
dc.relation.urlhttps://aia.springeropen.com/articles/10.1186/s42774-020-00035-wen_US
dc.subjectRarefied gas dynamics, mean free path, molecular dynamicsen_US
dc.titleA mean free path approach to the micro/nanochannel gas flowsen_US
dc.typeArticleen_US
dc.identifier.eissn2524-6992
dc.contributor.departmentUniversity of Derbyen_US
dc.identifier.journalAdvances in Aerodynamicsen_US
dcterms.dateAccepted2020-04-15
refterms.dateFOA2020-05-07T13:01:08Z
dc.author.detail786457en_US


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