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A Newton-Krylov solver for implicit solution of hydrodynamics in core collapse supernovae

D R Reynolds1, F D Swesty2 and C S Woodward3

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This paper describes an implicit approach and nonlinear solver for solution of radiation-hydrodynamic problems in the context of supernovae and proto-neutron star cooling. The robust approach applies Newton-Krylov methods and overcomes the difficulties of discontinuous limiters in the discretized equations and scaling of the equations over wide ranges of physical behavior. We discuss these difficulties, our approach for overcoming them, and numerical results demonstrating accuracy and efficiency of the method.


PACS

97.60.Bw Supernovae

97.60.Jd Neutron stars

95.30.Lz Hydrodynamics

95.75.Pq Mathematical procedures and computer techniques

Subjects

Fluid dynamics

Astrophysics and astroparticles

Dates

Issue 1 (2008)



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