塵埃等離子體中塵埃空洞形成的非線性理論.pdf

1、大連理工大學碩士學位論文塵埃等離子體中塵?？斩葱纬傻姆蔷€性理論姓名：毛松濤申請學位級別：碩士專業(yè)：等離子體物理指導教師：劉悅20070622塵埃等離子體中塵埃空洞形成的非線性理論NonlinearTheoryofDustVoidFormationinDustPlasmaAbstractDustyplasmaexistswidelyinspaceplasmalaboratoryplasmaandhightemperaturenuclear

2、fusionplasmaDustvoidswelefoundbothinexperimentsandapplicationsTounderstandthemechanismofdustyvoidformationindustplasmapeopleusedvariousmethodstodotheirresealch，gavemanydifferentexplanationsIn1999SamsonvandGoreehadtheirex

3、perimentalstudyinthefirsttimeforionizationinstabilitiesindustplasr眥TheirresearchshowsthattheionizationinstabilityindustplasmahastwostageslinearstageandnonlinearstageInlinearstage，a11]mrmonicwavesareexcited；theinstability

4、modeiSfilamentmodeInnonlinearstageanharmomcwavesfallintozerofrequencytheinstabilitymodeis‘greatvoidmode’ncyobservedaformationandallevolutionofdustvoidintheirexperimentandusedvariousexperimentalmethodsintheirresearchworkI

5、n2001，XiaogangWangcta1analyzedtheoreticallyindetailaboutionizationinstabilitiesandresonfneeacousticmodesindustpl鋤亂TheygavethedispersionrelationsandestablishedthetheoryofionizationinstabilityindustplasmainlinearstageIn200

6、3。Avinasheta1inthefirsttimeestablishedanonlineartheoryofdustvoidformationindustyplasmainonedimensionalCartesiancoordinatesystemTheirresearchshowsth筏inthedustvoidformationandevolutionprocess，thedustparticlesalemainlyaffec

7、tedbyelectricalfieldforceandiondragforceIntheirresearchworkeffectofdustconvectionWasnotconsideredInthispaperinonedimensionalcylindricalcoordinatesystemconsideringeffectofdustconvectionamathematicalmodelofdustvoidformatio

8、nindustyplasmaisestablishedThemodelissolvednumerically，Thenumericalresultsofdustvoidformationandevolutionindustplasmaareobtained1henumericalresultsshowthatcylindricalcoordinatesystemismoleclosetothesituationa姚theexperime