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Collisional effects in non-stationary plasma expansions along convergent-divergent magnetic nozzles

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dc.affiliation.dptoUC3M. Departamento de Ingeniería Aeroespaciales
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Equipo de Propulsión Espacial y Plasmas (EP2)es
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Ingeniería Aeroespaciales
dc.contributor.authorZhou, Jiewei
dc.contributor.authorSánchez Arriaga, Gonzalo
dc.contributor.authorAhedo Galilea, Eduardo Antonio
dc.contributor.authorMartinez-Sánchez, M.
dc.contributor.authorRamos, Jesús José
dc.date.accessioned2019-01-08T13:14:55Z
dc.date.available2019-01-08T13:14:55Z
dc.date.issued2018-05
dc.descriptionProceeding of: Space Propulsion Conference, SP 2018,14-18 mayo, Sevillaen
dc.description.abstractThe electron-electron collisional effect on the nonstationary expansion of a plasma in a convergentdivergent magnetic nozzle is studied. Under paraxial and fully magnetized plasmas approximations, an Eulerian code has been adapted to solve Poisson's equation coupled with the kinetic transport equations for plasma species, i.e. a Vlasov equation for singly-charged ions and a Boltzmann equation with a Bhatnagar-Gross-Kook operator for electrons. The study is focused on weakly collisional plasma plumes, which have a collisional time scale larger than the transit time in the nozzle of typical electrons. A kinetic analysis shows that phasespace regions of isolated, doubly-trapped electrons that are nearly empty in the collisionless case are progressively populated due to the electron-electron collisions. Such a higher density of trapped electrons modifies the profile of the electrostatic potential, which keeps almost unaltered the density of free electrons and decreases the density of the reflected ones. As compared with the collisionless case, the collisions decrease the length of the downstream sheath and the parallel electron temperature while increasing the normal one. Therefore the steady plasma state is more isotropic. The simulations show that collisions erase the time history of the system and, unlike the collisionless case, the steady state is unique.en
dc.description.sponsorshipJ.Z. was supported by Airbus DS (Grant CW240050). G.S-A was supported by the Ministerio de Economíıa y Competitividad of Spain (Grant RYC-2014-15357). E.A. was supported by the MINOTOR project, that received funding from the European Union’s Horizon2020 research and innovation programme,under grant agreement 730028. J.R. and M.M-S stays at UC3M for this research were supported by a UC3M-SantanderChair of Excellence and by National R&D Plan (Grant ESP2016-75887), respectively.en
dc.format.extent7es
dc.format.mimetypeapplication/pdf
dc.identifier.bibliographicCitationSpace Propulsion Conference 2018 (SP 2018)en
dc.identifier.urihttps://hdl.handle.net/10016/27853
dc.identifier.uxxiCC/0000028382
dc.language.isoengen
dc.relation.eventdate2018-05-14es
dc.relation.eventplaceSevillaes
dc.relation.eventtitleSpace Propulsion Conference 2018 (SP 2018)en
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/H2020/730028en
dc.relation.projectIDGobierno de España. RYC-2014-15357es
dc.rights.accessRightsopen accessen
dc.subject.ecienciaAeronáuticaes
dc.subject.otherMagnetic nozzlesen
dc.subject.otherBoltzmann equationen
dc.subject.otherWeakly collisional plasmasen
dc.titleCollisional effects in non-stationary plasma expansions along convergent-divergent magnetic nozzlesen
dc.typeconference proceedings*
dspace.entity.typePublication
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