Convection- and SASI-driven flows in parametrized models of core-collapse supernova explosions

E. Endeve; C. Y. Cardall; R. D. Budiardja; A. Mezzacappa

doi:10.1088/0031-8949/91/2/024002

Convection- and SASI-driven flows in parametrized models of core-collapse supernova explosions

E. Endeve, C. Y. Cardall, R. D. Budiardja, A. Mezzacappa

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Abstract

We present initial results from three-dimensional simulations of parametrized core-collapse supernova (CCSN) explosions obtained with our astrophysical simulation code General Astrophysical Simulation System (GenASIS). We are interested in nonlinear flows resulting from neutrino-driven convection and the standing accretion shock instability (SASI) in the CCSN environment prior to and during the explosion. By varying parameters in our model that control neutrino heating and shock dissociation, our simulations result in convection-dominated and SASI-dominated evolution. We describe this initial set of simulation results in some detail. To characterize the turbulent flows in the simulations, we compute and compare velocity power spectra from convection-dominated and SASI-dominated (both non-exploding and exploding) models. When compared to SASI-dominated models, convection-dominated models exhibit significantly more power on small spatial scales.

Original language	English
Article number	024002
Journal	Physica Scripta
Volume	91
Issue number	2
DOIs	https://doi.org/10.1088/0031-8949/91/2/024002
State	Published - Jan 22 2016

Funding

This research was supported in part by Oak Ridge National Laboratory, managed by UT-Battelle, LLC for the US Department of Energy under Contract No. De- AC05–00OR22725. It is based on work performed using the computational resource Darter [67], which is supported by the University of Tennessee and Oak Ridge National Laboratory’s Joint Institute for Computational Sciences. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the University of Tennessee, Oak Ridge National Laboratory, or the Joint Institute for Computational Sciences. Eirik Endeve thanks the CHIMERA collaboration, especially Eric Lentz, for many valuable discussions, and the organizers of the ‘Turbulent Mixing and Beyond Workshop 2014’ for a very stimulating program.

Funders	Funder number
Joint Institute for Computational Sciences
National Science Foundation	1439291
U.S. Department of Energy	AC05–00OR22725
Oak Ridge National Laboratory
University of Tennessee
UT-Battelle

Keywords

convection
numerical simulations
supernovae
turbulence

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10.1088/0031-8949/91/2/024002

Cite this

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title = "Convection- and SASI-driven flows in parametrized models of core-collapse supernova explosions",

abstract = "We present initial results from three-dimensional simulations of parametrized core-collapse supernova (CCSN) explosions obtained with our astrophysical simulation code General Astrophysical Simulation System (GenASIS). We are interested in nonlinear flows resulting from neutrino-driven convection and the standing accretion shock instability (SASI) in the CCSN environment prior to and during the explosion. By varying parameters in our model that control neutrino heating and shock dissociation, our simulations result in convection-dominated and SASI-dominated evolution. We describe this initial set of simulation results in some detail. To characterize the turbulent flows in the simulations, we compute and compare velocity power spectra from convection-dominated and SASI-dominated (both non-exploding and exploding) models. When compared to SASI-dominated models, convection-dominated models exhibit significantly more power on small spatial scales.",

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AU - Endeve, E.

AU - Cardall, C. Y.

AU - Budiardja, R. D.

AU - Mezzacappa, A.

PY - 2016/1/22

Y1 - 2016/1/22

N2 - We present initial results from three-dimensional simulations of parametrized core-collapse supernova (CCSN) explosions obtained with our astrophysical simulation code General Astrophysical Simulation System (GenASIS). We are interested in nonlinear flows resulting from neutrino-driven convection and the standing accretion shock instability (SASI) in the CCSN environment prior to and during the explosion. By varying parameters in our model that control neutrino heating and shock dissociation, our simulations result in convection-dominated and SASI-dominated evolution. We describe this initial set of simulation results in some detail. To characterize the turbulent flows in the simulations, we compute and compare velocity power spectra from convection-dominated and SASI-dominated (both non-exploding and exploding) models. When compared to SASI-dominated models, convection-dominated models exhibit significantly more power on small spatial scales.

AB - We present initial results from three-dimensional simulations of parametrized core-collapse supernova (CCSN) explosions obtained with our astrophysical simulation code General Astrophysical Simulation System (GenASIS). We are interested in nonlinear flows resulting from neutrino-driven convection and the standing accretion shock instability (SASI) in the CCSN environment prior to and during the explosion. By varying parameters in our model that control neutrino heating and shock dissociation, our simulations result in convection-dominated and SASI-dominated evolution. We describe this initial set of simulation results in some detail. To characterize the turbulent flows in the simulations, we compute and compare velocity power spectra from convection-dominated and SASI-dominated (both non-exploding and exploding) models. When compared to SASI-dominated models, convection-dominated models exhibit significantly more power on small spatial scales.

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Convection- and SASI-driven flows in parametrized models of core-collapse supernova explosions

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