Two-Dimensional Simulations of Relativistic Jeta€”Cloud Collisions

Zhang Hui-Min; Koide Shinji; Sakai Jun-Ichi

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Two-Dimensional Simulations of Relativistic Jeta€”Cloud Collisions

机译：相对论射流云碰撞的二维模拟

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Wehaveinvestigatedtheprocessesofbothnonrelativisticandrelativisticjet-cloudcollisionsusingarelativistichydrodynamicsimulationcode.Severalrunswereperformedtostudydifferentaspectsofthesekindsofcollisions.Simulationsshowthatthecollisionsinvolvetwokindsofprocesses:reflectionandbending.Collisionsofrelativisticjetsandhigh-Mach-numbernonrelativisticjetsappearasreflections,whilethecollisionsoflow-Mach-numbernonrelativisticjetsshowareflectionfeatureattheirearlystageandabendingfeatureattheirlatestage.Downstreamofthecollisionspointtheflowisstillsupersonic.Inthebendingcases,theoriginalsupersonicstateismaintainedallthetime,whileinthereflectionprocesses,thesupersonicconditionofthedownstreamsflowisre-establishedbyhighpressure.Thedeflectionangleisnotfixed;itdependsonalmostallparametersinvolvedinthecollisions.Evenforaparticularcollisionprocess,itsdeflectionangleisnotfixed,butratherchangeswithtime.Tworesultsarenoticeable:(1)thedeflectionanglecanbegreaterthan90?°;(2)inthecollisionregionofareflectionprocess,thetemperatureishighandthejetmaterialsuffersrapiddecelerationandreacceleration.

机译：Wehaveinvestigatedtheprocessesofbothnonrelativisticandrelativisticjet-cloudcollisionsusingarelativistichydrodynamicsimulationcode.Severalrunswereperformedtostudydifferentaspectsofthesekindsofcollisions.Simulationsshowthatthecollisionsinvolvetwokindsofprocesses：reflectionandbending.Collisionsofrelativisticjetsandhigh马赫 - numbernonrelativisticjetsappearasreflections，whilethecollisionsoflow马赫 - numbernonrelativisticjetsshowareflectionfeatureattheirearlystageandabendingfeatureattheirlatestage.Downstreamofthecollisionspointtheflowisstillsupersonic.Inthebendingcases，theoriginalsupersonicstateismaintainedallthetime，whileinthereflectionprocesses，thesupersonicconditionofthedownstreamsflowisre-establishedbyhighpressure.Thedeflectionangleisnotfixed; itdependsonalmostallparametersinvolvedinthecollisions.Evenforaparticularcollisionprocess，itsdeflectionangleisnotfixed，butratherchangeswithtime.Tworesultsarenoticeable：（1）thedeflectionanglecanbegreaterthan90 ？°;（2）在挠曲过程的碰撞区域ss，温度高，喷气材料会快速减速和重新加速。

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《PASJ: Publications of the Astronomical Society of Japan》 |1999年第2期|共页
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Zhang Hui-Min; Koide Shinji; Sakai Jun-Ichi;
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Two-Dimensional Simulations of Relativistic Jeta€”Cloud Collisions

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