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

Journal Article · Fri Jan 22 00:00:00 EST 2016 · Physica Scripta

DOI:https://doi.org/10.1088/0031-8949/91/2/024002· OSTI ID:1394562

Endeve, Eirik ^[1]; Cardall, Christian Y. ^[2]; Budiardja, Reuben D. ^[3]; Mezzacappa, Anthony ^[4]

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1. 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
2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Physics Division; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy
3. Univ. of Tennessee, Knoxville, TN (United States). National Inst. for Computational Sciences
4. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy

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.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC05-00OR22725
• OSTI ID: 1394562
• Alternate ID(s): OSTI ID: 22552891
• Journal Information: Physica Scripta, Journal Name: Physica Scripta Journal Issue: 2 Vol. 91; ISSN 0031-8949
• Publisher: IOP Publishing
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
convection
numerical simulations
supernovae
turbulence