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dc.contributor.authorXie, Jianfei
dc.date.accessioned2019-10-03T14:23:49Z
dc.date.available2019-10-03T14:23:49Z
dc.date.issued2019-07-16
dc.identifier.citationXie, J., Borg, M.K., Gibelli, L., Henrich, O., Lockerby, D.A. and Reese, J.M., (2019). 'Effective mean free path and viscosity of confined gases'. Physics of Fluids, 31(7), pp. 1-31. DOI: 10.1063/1.5108627en_US
dc.identifier.issn10706631
dc.identifier.doi10.1063/1.5108627
dc.identifier.urihttp://hdl.handle.net/10545/624172
dc.description.abstractThe molecular mean free path (MFP) of gases in confined geometries is numerically evaluated by means of the direct simulation Monte Carlo method and molecular dynamics simulations. Our results show that if calculations take into account not only intermolecular interactions between gas molecules but also collisions between gas molecules and wall atoms, then a space-dependent MFP is obtained. The latter, in turn, permits one to define an effective viscosity of confined gases that also varies spatially. Both the gas MFP and viscosity variation in surface-confined systems have been questioned in the past. In this work, we demonstrate that this effective viscosity derived from our MFP calculations is consistent with those deduced from the linear-response relationship between the shear stress and strain rate using independent nonequilibrium Couette-style simulations as well as the equilibrium Green-Kubo predictions.en_US
dc.description.sponsorshipUK’s Engineering and Physical Sciences Research Council (EPSRC) via Grant Nos. EP/N016602/1 and EP/R007438/1 National Natural Science Foundation of China (Grant No. 51506110) EPSRC Early Career Research Software Engineer Fellowship Scheme (Grant No. EP/N019180/2)en_US
dc.language.isoenen_US
dc.publisherAIP Publishingen_US
dc.relation.urlhttps://aip.scitation.org/doi/10.1063/1.5108627en_US
dc.relation.urlhttps://strathprints.strath.ac.uk/68893/en_US
dc.subjectrarefied gas dynamicsen_US
dc.subjectmean free pathen_US
dc.subjectmolecular dynamicsen_US
dc.titleEffective mean free path and viscosity of confined gasesen_US
dc.typeArticleen_US
dc.identifier.eissn10897666
dc.contributor.departmentUniversity of Derbyen_US
dc.contributor.departmentUniversity of Edinburghen_US
dc.contributor.departmentUniversity of Strathclydeen_US
dc.contributor.departmentUniversity of Warwicken_US
dc.identifier.journalPhysics of Fluidsen_US
dc.source.volume31
dc.source.issue7
dc.source.beginpage072002
dcterms.dateAccepted2019-06
dc.author.detail786457en_US


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