Abstract
A multitemperature code intended for the numerical solution of the multicomponent gas dynamics equations in problems with a high energy density in matter is described. The velocities of all components with “nonzero” masses are assumed to be identical. The gas dynamic part is based on the Godunov’s scheme and an efficient Riemann problem solver with an approximate local equation of state. As an example of the code application, the gravitational collapse of the massive star’s core with a neutrino transport is considered. A self-consistent formulation of the gravitational collapse is solved using 2D gas dynamics, taking into account the spectral transport of neutrinos in the framework of neutrino flux-limited diffusion. Large-scale convection leads to an increase in the mean energy of the neutrinos from 10 to 15 MeV, which is important for explaining supernovae, as well as, for designing experiments on detecting high-energy neutrinos from supernovae.
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Aksenov, A.G. (2021). A Multidimensional Multitemperature Gas Dynamic and the Neutrino Spectrum in 2D Gravitational Collapse. In: Favorskaya, M.N., Favorskaya, A.V., Petrov, I.B., Jain, L.C. (eds) Smart Modelling For Engineering Systems. Smart Innovation, Systems and Technologies, vol 214. Springer, Singapore. https://doi.org/10.1007/978-981-33-4709-0_6
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