Response of nuclear-dissociating shocks to vorticity perturbations

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Show simple item record Huete Ruiz de Lira, César Abdikamalov, Ernazar 2021-05-17T09:00:45Z 2021-05-17T09:00:45Z 2019-09
dc.identifier.bibliographicCitation Huete, C. & Abdikamalov, E. (2019). Response of nuclear-dissociating shocks to vorticity perturbations. Physica Scripta, 94(9), 094002.
dc.identifier.issn 0031-8949
dc.description.abstract In the context of core-collapse supernova explosions, 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 postshock 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 postshock 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.
dc.description.sponsorship This work is supported by the Ministry of Science, MEC (ENE2015-65852-C2-1-R) and Fundación Iberdrola España (BINV-hBbhOeJQ), Spain (for C Huete), by MES RK state-targeted program BR05236454, MES RK grant No. 346, NU ORAU grant SST 2015021 and NU grant No. 090118FD5348 (for E Abdikamalov).
dc.format.extent 15
dc.language.iso eng
dc.publisher IOP Publishing
dc.rights © 2019 IOP Publishing Ltd
dc.subject.other Shock wave
dc.subject.other Supernovae
dc.subject.other Turbulence
dc.title Response of nuclear-dissociating shocks to vorticity perturbations
dc.type article
dc.subject.eciencia Fusión
dc.rights.accessRights openAccess
dc.relation.projectID Gobierno de España. ENE2015-65852-C2-1-R
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 094002
dc.identifier.publicationissue 9
dc.identifier.publicationtitle Physica Scripta
dc.identifier.publicationvolume 94
dc.identifier.uxxi AR/0000025095
dc.contributor.funder Ministerio de Economía y Competitividad (España)
dc.affiliation.dpto UC3M. Departamento de Ingeniería Térmica y de Fluidos
dc.affiliation.grupoinv UC3M. Grupo de Investigación: Mecánica de Fluidos
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