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

Endeve, Eirik; Cardall, Christian Y.; Budiardja, Reuben D.; Mezzacappa, Anthony

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

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

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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). Here, 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.

Authors:

^[1];

^[2];

^[3]; Mezzacappa, Anthony ^[4]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Computer Science and Mathematics Division; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Physics Division; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy
Univ. of Tennessee, Knoxville, TN (United States). National Inst. for Computational Sciences
Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy

Publication Date:: Fri Jan 22 00:00:00 EST 2016

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1394562

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Physica Scripta

Additional Journal Information:: Journal Volume: 91; Journal Issue: 2; Journal ID: ISSN 0031-8949

Publisher:: IOP Publishing

Country of Publication:: United States

Language:: English

Subject:: 79 ASTRONOMY AND ASTROPHYSICS; supernovae; turbulence; convection; numerical simulations

Citation Formats


                    Endeve, Eirik, Cardall, Christian Y., Budiardja, Reuben D., and Mezzacappa, Anthony. Convection- and SASI-driven flows in parametrized models of core-collapse supernova explosions.  United States: N. p., 2016. 
Web.  doi:10.1088/0031-8949/91/2/024002.

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                    Endeve, Eirik, Cardall, Christian Y., Budiardja, Reuben D., & Mezzacappa, Anthony. Convection- and SASI-driven flows in parametrized models of core-collapse supernova explosions.  United States.  https://doi.org/10.1088/0031-8949/91/2/024002

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                    Endeve, Eirik, Cardall, Christian Y., Budiardja, Reuben D., and Mezzacappa, Anthony. Fri .  
"Convection- and SASI-driven flows in parametrized models of core-collapse supernova explosions".  United States.  https://doi.org/10.1088/0031-8949/91/2/024002.  https://www.osti.gov/servlets/purl/1394562.

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@article{osti_1394562,

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

  author       = {Endeve, Eirik and Cardall, Christian Y. and Budiardja, Reuben D. and Mezzacappa, Anthony},

  abstractNote = {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). Here, 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.},

  doi          = {10.1088/0031-8949/91/2/024002},

  journal      = {Physica Scripta},

  number       = 2,

  volume       = 91,

  place        = {United States},

  year         = {Fri Jan 22 00:00:00 EST 2016},

  month        = {Fri Jan 22 00:00:00 EST 2016}

}

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