|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'506'133
Articles rated: 2609
27 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Response of nuclear-dissociating shocks to vorticity perturbations | | César Huete
; Ernazar Abdikamalov
; | | Date: |
14 Dec 2018 | | Abstract: | In the context of core-collapse supernova explosions (CCSNe), the interaction
of standing accretion shocks with upstream vorticity perturbations is
investigated by linear theory analysis. The endothermic effect associated to
the nuclear dissociation, which takes place right behind the shock wave,
affects the amplitude of the perturbations amplified/generated across the
front. For upstream disturbances whose characteristic size is much larger than
the post-shock dissociation-layer thickness, the effect of nuclear dissociation
can be reduced to that of considering the global endothermic effect that scales
with the inflow energy flux. The present study focuses on perturbation fields
that are not isotropic, which mimic the perturbations in collapsing convective
shells of massive stars. The linear interaction of the shock with bidimensional
mono-frequency vorticity perturbations is theoretically addressed, with the
limit of highly-stretched vortices being analyzed in detail. The exact spatial
distribution of the rotational and acoustic perturbations generated in the
post-shock flow are provided along with the transient evolution of the shock
front. It is found that nuclear dissociation contributes to stabilize the shock
oscillations, but increases the amplitude of the density perturbations
downstream. An extension of this work that addresses the interaction with
tridimensional isotropic turbulent flows can be found in reference Huete, C.,
et al. 2018, MNRAS, 475, 3305-3323, which analyzes the effect of the post-shock
flow on the critical conditions that ultimately trigger explosion. | | Source: | arXiv, 1812.5860 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER