Implementation of a network of nuclear reactions of moderate size aimed at simulating Type Ia supernova explosions
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hdl:2117/358675
Tipus de documentTreball Final de Grau
Data2021-07-13
Condicions d'accésAccés obert
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Abstract
A key ingredient in any numerical study of supernova explosions is the nuclear network routine that is coupled with the hydrodynamic simulation code. When these studies are performed in more than one dimension, the size of the network is severely limited by computational issues. Nevertheless, the characteristic size of these networks has been increasing over the years, from around seven nuclei in pioneering multi-D calculations to roughly fifty at present times. The main goal of this work is to improve, optimize and test a nuclear network of 87 nuclei specially addressed to multidimensional studies of both types of supernova explosions, but with emphasis in thermonuclear Type Ia events. The nuclear network, Net87, is a natural extension of the old network with 14 species, Net14, which was routinely used by the UPC-SciCore collaboration to simulate supernova explosions with good results. Net87 includes reactions for neutrons, protons and alpha particles. One relevant, and original, feature is that electron captures on protons have been incorporated into the network, providing a better track of both, the neutronized species and the gas pressure. A second important feature is that the reactions are implicitly coupled with the temperature, which allows for a more stable approach to the nuclear statistical equilibrium regime and to the freeze-out of the reactions during the expansion. Here we analyze the performance of the Net87 routine in light of both: the computational overhead of the algorithm and the released nuclear energy and produced yields during the combustion in typical Type Ia Supernova (SN Ia) conditions.
TitulacióGRAU EN ENGINYERIA FÍSICA (Pla 2011)
Document relacionathttp://infoteleco.upc.edu/incoming/pfc/160625/TFG_Poster_eFfOVK.pdf
Fitxers | Descripció | Mida | Format | Visualitza |
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TFG_Nuclear_Network.pdf | 1,610Mb | Visualitza/Obre |