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dc.contributor.authorWang, Puen_US
dc.date.accessioned2014-03-14T21:09:34Z
dc.date.available2014-03-14T21:09:34Z
dc.date.issued2010-01-25en_US
dc.identifier.otheretd-02152010-173137en_US
dc.identifier.urihttp://hdl.handle.net/10919/37368
dc.description.abstractSurface charging is a fundamental interaction process in space plasma engineering. A three-dimensional Immersed Finite Element Particle-In-Cell (IFE-PIC) method is developed to model surface charging involving complex boundary conditions. This method extends the previous IFE-PIC algorithm to explicitly include charge deposition on a dielectric surface for charging calculations. Three simulation studies are carried out using the new algorithm to model current collection and charging in both the orbital motion limited (OML) and space charge limited regime. The first one is a full particle simulation of the charging process of single small sphere and clusters of multiple small spheres in plasma. We find that while single sphere charging agrees well with the predictions of the OML theory, the charging of a sphere in a cluster is significantly, indicating that the often used OML charging model is not an accurate one to model charging in dusty plasma. The second one concerns a secondary electron emission experiment. The simulation includes detailed experimental setup in a vacuum chamber and the results are compared against experimental data. The simulation is used to determine the facility error in experiments. The third one is a full particle simulation of charging on lunar surface. The simulation concerns both flat and non-flat surface, and spacecraft on lunar surface, in the lunar polar region. The surface sees a mesothermal solar wind plasma flow and the emission of photoelectrons and secondary electrons. At a small sun elevation angle, the surface landscape generates a complex plasma flow field and local differential charging on surface. The results will be useful for further study of charging and levitation of lunar dust.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartWang_P_D_2010.pdfen_US
dc.rightsI hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Virginia Tech or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.en_US
dc.subjectChargingen_US
dc.subjectParticle-In-Cellen_US
dc.subjectImmersed Finite Elementen_US
dc.titleImmersed Finite Element Particle-In-Cell Modeling of Surface Charging in Rarefied Plasmasen_US
dc.typeDissertationen_US
dc.contributor.departmentAerospace and Ocean Engineeringen_US
dc.description.degreePh. D.en_US
thesis.degree.namePh. D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineAerospace and Ocean Engineeringen_US
dc.contributor.committeechairWang, Joseph J.en_US
dc.contributor.committeememberScales, Wayne A.en_US
dc.contributor.committeememberLin, Taoen_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-02152010-173137/en_US
dc.contributor.committeecochairRoy, Christopher J.en_US
dc.date.sdate2010-02-15en_US
dc.date.rdate2010-03-03
dc.date.adate2010-03-03en_US


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