Interaction of Turbulence with Shock Waves in the Context of Core-Collapse Supernovae

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dc.contributor.editorBerdibek, Shapagat
dc.date.accessioned2018-11-01T05:46:23Z
dc.date.available2018-11-01T05:46:23Z
dc.date.issued2017-04
dc.description.abstractThe supernova explosion of massive stars is a complex physical event. Nuclear shell burning in the nal stages of the lives of massive stars is accompanied by strong turbulent convection. The resulting uctuations aid supernova explosion by amplifying the non-radial ow in the post-shock region. We investigate the physical mechanism behind this ampli cation using a linear perturbation theory. We model the shock wave as a one-dimensional planar discontinuity and consider its interaction with vorticity and entropy perturbations in the upstream ow. We nd that, as the perturbations cross the shock, their total turbulent kinetic energy is ampli ed by a factor of 2, while the average linear size of turbulent eddies decreases by about the same factor. We also study the e ects of the interaction of acoustic perturbations with the shock wave. We determine that the post-shock turbulent kinetic energy is dominated by vorticity waves. In addition, we nd that the kinetic energy ampli cation of perturbations increases as / M21 . Finally, we discuss the implication of our results for the supernova explosion mechanism. We show that the upstream perturbations can decrease the critical neutrino luminosity for producing explosion by several percent.en_US
dc.identifier.citationShapagat Berdibek. Interaction of Turbulence with Shock Waves in the Context of Core-Collapse Supernovae. 2017. Department of Physics, School of Science and Technology, Nazarbayev Universityen_US
dc.identifier.urihttp://nur.nu.edu.kz/handle/123456789/3583
dc.language.isoenen_US
dc.publisherNazarbayev University School of Science and Technologyen_US
dc.rightsAttribution-NonCommercial-ShareAlike 3.0 United States*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/3.0/us/*
dc.subjectTurbulenceen_US
dc.subjectShock Wavesen_US
dc.subjectCore-Collapse Supernovaeen_US
dc.titleInteraction of Turbulence with Shock Waves in the Context of Core-Collapse Supernovaeen_US
dc.typeMaster's thesisen_US
workflow.import.sourcescience

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