磁尾磁場重聯(lián)的二維混合模擬研究.pdf

1、大連理工大學(xué)碩士學(xué)位論文磁尾磁場重聯(lián)的二維混合模擬研究姓名：王旭丹申請學(xué)位級別：碩士專業(yè)：等離子體物理指導(dǎo)教師：劉悅20060601磁尾磁場重聯(lián)的二維混合模擬研究ATwodimensionalHybridSimulationStudyofMagnetotailMagneticReconnectionAbstractTheprocessofmagneticreconnectionandiondynamicsinthedistantmagn

2、etotailarestudiedbyusingatwo—dimensionalthreecomponents『25D)hybridsimulationThesimulationdomainisarectangleinthe材planearoundXlineinthedistantmagnetotailAninitialcurrentsheetseparatesthesimulationdomainwitIlantiparallelma

3、gneticfieldcomponentsinthexdirectionAfiniteresistivityiSimposedatthecenterofthesimulationdomainandthecollisionfrequencyisusedtomodelthemsistivityItCallbefoundthataleadingbulgelikemagneticfieldconfigurationisformedduringt

4、heprocessofmagneticrecormeetion而emagneticfielddecreasesandplasmaflowspeed，temperature，densitythermalpressureincreasefromeitherloberegiontotheplasmasheetcemerAstrongtemperatureaniso仕opyisfoundintheplasmasheetboundarylayer

5、Theresearchindicatesthatalthoughtheguidefieldistakentobezero，the鼠contoursshowaclearquadrupolarstructurearoundtheXpointInadditionthevelocitydistributionsofiondeviatefromtheinitialMaxwelldistributionintheoutflowregionInthe

6、firstchapteraMefintroductionoftheconceptandprocessclassicalphysicalmodelandtheresearchgeneralsituationofmagneticreeormectioninspaceplasmaismadenleadvantagesanddisadvantagesbetweentheMHDsimulationmethod，fullparticlesimula

7、tionmethodandhybridsimulationme也odarecomparedinthesecondchapterThenabriefintroductionofthehybridsimulationmethodismadeInthethirdchapterthesimulationmodel，basicequations，normalizedparameterinitialconditionsandboundarycond

8、itionsarepresentedThissectionalSOdescribestheparticleandmagneticfieldupdatenesimulationresultsanddiscussionsarepresentedinthefourthchapternlestructuresofmagneticfieldandtheevolutionsofsomephysicalquantitieshavebeenshownT

9、hequadrupolarstructureofByisalsoshownnetemperatureanisotropyandtheiondistributionintheoutflowregionarediscussedinthissectionalSOFinally，conclusionsandthefutureworkaregiveninthe1astchapterKeyWords：MagneticReconneetion；Hyb